Monel K500 Tube thiab yeeb siv rau hluav taws xob Cheebtsam hluav taws xob thiab lub valus valu

Ntxiv rau cov txiaj ntsig ib puag ncig no, stainless hlau kuj tseem yog kev txaus siab, yooj yim kom muaj kev tu siab, yooj yim ruaj khov thiab muaj ntau yam. Raws li qhov tshwm sim, stainless hlau tuaj yeem pom hauv ntau yam khoom txhua hnub. Nws kuj tseem yog lub luag haujlwm tseem ceeb hauv kev lag luam, suav nrog lub zog, kev thauj mus los, kev tshawb fawb, kev tshawb fawb, tshuaj, khoom siv, cov khoom siv.

Lub corrosion resistant Hastelloy alloys tau siv dav los ntawm kev lag luam ua lag luam. Qhov kev xav tau rau kev ua tau zoo ua rau lawv txoj kev lees paub thiab kev loj hlob hauv thaj chaw ntawm lub zog, kev noj qab haus huv thiab ib puag ncig, roj thiab cov roj thiab cov roj cuv khw desulfurization.

Incoloy 800H Flange Peb muaj lub koob npe nrov hauv kev lag luam rau kev tsim cov hom kev ua haujlwm zoo ntawm cov hom uas yuav tsum tau ua rau peb cov neeg siv khoom. Peb tsim khoom tsim prololoy 800 flanges uas muaj kev ntseeg siab thiab siab dua. Peb siv cov peev txheej hwm thiab qib siab tshaj tawm rau kev tsim ASTM B564 UNFANCES 800 flanges.

A789 unc unic s31803 thiab unspes ob qib ntawm ob chav stainless hlau uas tau siv dav hauv ntau cov ntawv thov. Cov txiv neej duplex s31803 Seamless kav yog paub rau lawv cov txiv neej ua hauj lwm zoo, muaj lub zog siab, thiab weldability thiab zoo weldability. A789 yog ib qho tshwj xeeb uas tau them seamless thiab welded tub ua los ntawm duplex steel stainless hlau.

Alloy Steel A182 F12 Flanges tau ua rau General corrosion, pitting, thiab cov pob txha, thiab cov sulfuric, thiab nitric acids. Alloy Steel F12 dig muag Flanges kuj muaj ib qho zoo tsis kam los pitting hauv chloride daws, ib qho zoo ua rau kev tawg thiab kev ntxhov siab corrosion tawg.

ASTM B366 WPNICMCS cov kav dej steel thiab fittings reducers inconel 718 Reducer
SCH40 monel 400 yeeb nkab raug xaiv raws li Werkstoff tus lej 2.4360 thiab tsis yog N04400. Alloy 400 cov kav hlau tseem hu ua monel aleloy 400 Yeeb Nkab, Monel 400 Yeeb & Nickel Alloy 400 Yeeb Nkab.
Incoloy 800h yeeb nkab nrog lub siab temp anneal

Nws ua rau pom zoo tsis kam mus rau nruab nrab thiab txo qhov chaw. Cov alloy no tsim ib zaj yeeb yaj kiab oxide, kev tiv thaiv zaj duab xis uas tsis tawm mus, tab sis nws khaws cov oxidation superi-sauv tsis kub.

Caw 36 ® yog npib npib npib tsib xee, tsis muaj nyiaj npib ob leeg uas muaj 36%, commar 36 muaj qhov kub tsawg los ntawm kev nthuav dav ntawm + 500 ° F (260 ° C).

Hastelloy C2000 muaj nyob rau ntau qhov ntau thiab tsawg, hom no-lickel-molybdenum alloy muaj zog thiab corrosion tsis kam.

Nilo Alloy 36, W.NR 1.3912, Tiv Thaiv 36% Nickel-Npib thiab muaj tus nqi ntawm kev nthuav dav ntawm cov hlau.

Duplex 2205 tau raug sim nyob rau hauv kev cuam tshuam los ntawm chav sov ntawm chav sov piv rau SS316. Cov txiaj ntsig qhia tau hais tias Duplex 2205 muaj kwv yees li ob zaug ntawm kev qaug zog hloov \ / paib lub zog.

Nickel alloy kav yog tsim los ntawm alloys nrog npib tsib xee raws li lub ntsiab lus tseem ceeb. Nws yog dav siv rau nws lub zog kub siab, corrosion tsis kam, thermal nthuav dav, tshwj xeeb cov khoom sib nqus.

ASTM A269 TP369 Tp316 1.4401 Seamless yeeb nkab yog ib qho kev lag luam zoo ntawm cov khoom lag luam uas yog siv ntau yam kev lag luam vim nws qhov kev ua tau zoo, thiab ua kom sov. Qhov yeeb nkab seamless yog tsim los ntawm 316 qib stainless hlau, uas tau paub rau nws cov khoom zoo.

Stainless hlau kuj yog ib puag ncig nruab nrab thiab inert, thiab nws lub siab ntev kom nws ua tau zoo ntawm kev siv. Tsis tas li ntawd, nws tsis tso cov tebchaw uas tuaj yeem hloov kho nws cov muaj pes tsawg leeg thaum sib cuag nrog dej.

316 Stainless hlau yog ib chav kawm dav dav ntawm cov hlau uas muaj feem ntau uas muaj qee feem pua ​​ntawm cov hlau los tiv thaiv cov hlau los ntawm kev puas tsuaj thiab cuam tshuam kev puas tsuaj. Tus nqi ntawm chromium hauv lub alloy¡nankand tus nqi ntawm lwm yam xim hlau cov khoom sib txawv nyob ntawm cov qib ntawm stainless hlau siv.

Nickel alloy 400 thiab Monel 400, tseem hu ua UN tsis zoo li N04400, yog ib qho laj thawj ntawm cov menyuam yaus uas muaj feem ntau ntawm ob feem peb ntawm ob feem ntawm ob-tus tooj liab. Nickel Alloy 400 yog paub txog nws txoj kev tiv thaiv rau ntau yam ntawm cov kab mob ntawm cov xeb, suav nrog cov alkalis (lossis cov kua qaub), dej hli, thiab sulfuric acid. Txij li thaum Monel 400 lossis Alloy 400 yog cov hlau txias ua haujlwm, cov alloy muaj siab tawv, txhav thiab muaj zog. Los ntawm kev ua haujlwm txias ASTM B14400 Bar Tshuag, cov alloy yog raug rau cov kev ntxhov siab ntau dua, uas nyob rau hauv Alloy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Micro ..

A234 WPB Ansi B16.9 ASTM Cov Yeeb Nkab Fittings 30D 45D 90D Scch20 ​​STD Scch40 carbon steel hlau Luj Tshib

DIN931 2205-S31803 ib nrab xov xwm duplex sheet lub taub hau hex bolt1-2-1-2 hex taub hau kub 2205-s31803 hex ntsia liaj qhov rooj

Inconel 625 coil yog cov yam ntxwv zoo los ntawm nws cov kev tiv thaiv zoo rau oxidation, qhov siab-kub corrosion thiab qaug zog. ASTM B443 tsis yog N06625 Inconel P phaj tau siv dav hauv Aerospace, kev ua lag luam thiab roj thiab muaj zog zoo dua qub txawm tias muaj ib puag ncig zoo.

Qhov zoo tshaj plaws tshuab luam ntawv rau cov monel k500 ceg tawv taub pob qij txha yog nyob rau hauv anealed mob. Lub caij no, cov Monel K500 Socket Weld Flanges tseem muaj nyob rau ntau qhov sib txawv thiab cov duab rau peb cov neeg siv khoom.

A335 P9 Seamless yeeb nkab yog ib hom chrome molybdenum cov yeeb nkab teev npe, tsis yog ua rau nws lub zog tense-moly), tab sis kuj yog vim nws tau txais txiaj ntsig zoo. Chromium Molybdenum cov leeg yog nrov nyob P Qib P5, P9, P11, P22, P91 thiab P92. Cov qhab nia P11, P22 thiab P91 feem ntau siv nyob rau hauv cov hmoov kev lag luam thiab petrochemical nroj tsuag, thaum P9 qib siab feem ntau siv hauv cov roj ua kom zoo.

Hastelloy C2000 tub tshij yog siv nyob rau hauv ntau hom petrochemical suav nrog cov khoom siv tshuaj lom neeg, roj kev tsim khoom siv, roj ntxiv thiab cov nroj tsuag hluav taws xob.

DupleX Steel Yeeb Nkab & Tube
Stainless hlau yuav tsum muaj tsawg kawg 10.5 feem pua ​​chromium. Nyob ntawm cov qhab nia, nws yuav muaj ntau dua cov khoom siv chromium ntau dua li molybdenum, noy, tooj liab, nitrogen, phosphorous lossis selenium.

Forged ASME B16.36 Flanged Yeeb Nkab Fittings Monel 400 N04400 Orifice Flange Monel 400 Flanges qhia cov pov thawj ntawm qhov kub thiab txias. Ntawm qhov tod tes, cov khoom siv xws li lub zog thiab hatness ntawm monel 400 ceg tawv sib koom tes tsuas yog hais txog lwm cov khoom los yog cuam tshuam tsis kam.

Lub 316 cov raj kav hlau tsis muaj roj Lub raj muaj peev xwm tawm tsam thiab kua muag, thiab lawv muaj lub zog siab thiab ua kom zoo dua rau kev xeb, thaum piv rau 304 ss tub

316L 1.4401 tus yeeb nkab stainless hlau yog ib qho kev xaiv yeeb nkab zoo heev thiab cov yeeb nkab ruaj khov siv hauv ntau cov ntawv siv. Qhov no ss s31603 yeeb nkab yog tsim los ntawm cov hlau zoo 316L stainless ua rau corrosion, oxidation thiab staining rau cov chaw hnyav lossis kev siv ntxhov siab.

ASTM A240 Hom 2205 Phaj yog lub Duplex phaj yog siv ntau yam kev lag luam xws li kev ua yeeb yam, roj thiab roj kev tshawb nrhiav, thiab marine engineering. Sa 240 gr 2205 daim ntawv yog tsim los ntawm qib 220) stainless hlau, uas yog kev sib xyaw ntawm ferritic thiab ustenitic steel.

Hastelloy C-276 yog npib tsib xee-molybdenum alloy nrog universal corrosion tsis tau los ntawm lwm yam alloy. Nws muaj qhov zoo tshaj plaws rau ntau cov txheej txheem tshuaj ib puag ncig xws li chlorine, cov tshuaj acoracic, cov tshuaj acoracic, cov tshuaj acoracic, cov tshuaj pleev pob zeb thiab cov tshuaj ntsuab thiab hypochlorite thiab chlorine dioxide daws. Alloy C276 kuj tau nplua txog kev tsim cov qoob loo ciam teb nag los nag lossis cov txheej txheem cua sov ua rau muaj txiaj ntsig rau cov txheej txheem tshuaj lom neeg feem ntau. Nws muaj qhov ua tau zoo heev rau pitting thiab kev nyuaj siab corrosion tawg.

Ntxiv ib qho me me ntawm mg mus rau Monel K-500 alloy tuaj yeem nce cov qoob loo cov qoob loo sib zog thiab txhim kho kev kub siab kom sov.

Stainless hlau tuav & Rods
Duplex Steel Fasteners
ASME B36.19M yog tus qauv kev qhia tshwj xeeb rau cov kav hlau stainless hlau, uas qhia txog kev ua siab ntev, thiab tsim khoom rau cov kav dej thiab cov txiv ntseej.
Stainless hlau kav Khoom siv hlau 316

Nws muaj peev xwm tiv thaiv ntau yam ntawm oxidizing thiab tsis-oxidizing tshuaj, thiab cov khoom ua kom pom tseeb zoo rau pitting thiab crevice nres nyob rau hauv muaj cov chlorides thiab lwm yam.

Titanium lub ntom yog li 60% uas ntawm stainless hlau thiab nickel alloys, qhov hnyav no txuag ua rau nws xaiv qhov chaw zoo uas yog qhov tseem ceeb xws li aerospace.

Tsau-nthuav dav iav-encapsulated girapsulated alloys, muaj ib qho kev nthuav dav thermal, muaj ib lub khob hluav taws xob nthuav dav zoo ib yam li qhov ntsuas kub

304 Piping spools yog tsim los ntawm 304 stainless hlau, ib qho khoom siv nrov thiab nrov tshaj plaws hauv ntau cov ntawv thov uas xav tau kev tiv thaiv kom xeb thiab oxidation. Cov kev tshaj lij no yog preooss siv cov machinery thiab cov txheej txheem tshwj xeeb, uas paub meej tias lawv muaj tseeb thiab ntseeg tau.
Lub ASTM A790 Duplex Welded Kav yog ib qho piv txwv ntawm welded duplex yeeb nkab. Muaj ntau cov qhab sib txawv ntawm cov kav dej duplex nrog cov khoom sib txawv cov khoom siv. Muaj cov yas, super duplex thiab leny Pawg nyob rau hauv lub duplex kav ntau yam. Lub Seamless Duplex kav yog ob qho tib si muaj zog thiab yog corrosion resistant.
Al6XN yog superaustenitic steel hlau nrog kev ua tau zoo rau chloride pitting, crevice corrosion thiab kev nyuaj siab corrosion tawg. Al6XN yog 6 Moly alloy uas tau tsim rau thiab siv hauv kev sib cav sib ceg siab. Nws muaj cov npib tsib xee (24%), Molybdenum (6.3%), nitriumen thiab chromium cov ntsiab lus tawg, thiab tshwj xeeb corrosion tiv thaiv. Al6XN yog feem ntau siv rau nws cov kev txhim kho pitting thiab crevice corrosion tsis kam hauv chlorides. Nws yog ib qho tsim nyog thiab weldable stainless hlau.

ASTM A234 WPB Luj tshib yog tus qauv kev qhia tshwj xeeb rau cov pitting fittings ntawm wrought carbon hlau thiab alloy steel haum rau kev pab kub thiab kub.

Nickel-Tooj-based alloy 400 monel 2.4360 txias kos cov kab mob kev ntxhov siab thaum raug rau corrosive cracking thaum raug rau cov media corrosive nyob rau hauv ib puag ncig ib puag ncig. Monel 400 yog tooj liab thiab nickel raws li alloy uas nrov niaj hnub no vim nws qhov kev ua tau zoo. Lub alloy muaj kua qaub zoo heev thiab alkali tsis kam. Tsis tas li ntawd, nws muaj cov zog tensile muaj zog, ductility, zoo heev thermal condactivity, thiab tuaj yeem yog tawv los ntawm kev ua haujlwm txias. Ib qho ntxiv, nws tuaj yeem siv rau hauv cov ntawv thov nrog qhov kub thiab txias txij li rho tawm txog 538 degrees Celsius.

Stainless hlau yog ib qho alloy ntawm cov hlau uas tiv taus xeb thiab xeb. Nws muaj tsawg kawg yog 11% chromium thiab tej zaum yuav muaj cov ntsiab lus xws li carbon, lwm yam tsis yog lwm yam kom tau lwm yam uas xav tau. Stainless hlau qhov tsis kam rau corrosion tau los ntawm cov chromium, uas ua cov yeeb yaj kiab passive uas tuaj yeem tiv thaiv cov khoom thiab kho tus kheej nyob rau hauv lub xub ntiag ntawm oxygen

Txoj kev hloov pauv ntawm Flange tuab ntawm Flange tuab rau cov yeeb nkab lossis cov phab ntsa tuab, nyob rau hauv cov kab uas pheej yig dua lossis lwm yam kev nthuav dav.

Nickel 200 flanges lub npib tsib xee 200 flanges yog ruaj, tshuav ruaj khov, thiab muaj kev ua tiav zoo. Ntxiv mus, cov ASTM B564 tsis pom N02200 dig muag flanges tiv taus ib puag ncig hauv nruab nrab thiab oxidizing ib puag ncig, ua rau lawv zoo meej rau kev siv hauv cov khoom siv khoom noj khoom haus.

Stainless hlau 304 flanges uas tsim thiab muab los ntawm cov tswv yim npaj thiab zoo-ua haujlwm ntim thiab cov txheej txheem xa tawm. Peb unc undless steel wrd caj dab caj dab tuaj nyob rau ntau lub sij hawm ntawm cov kav dej ntawm cov kav dej uas muaj peev xwm pom tau vim nws lub hub tapered uas nws kis las.

Manufacture los ntawm 304 \ / 304l lossis 316 \ / 316L Stainless hlau nrog milled sab hauv thiab sab nraud diameters (id \ / / od). Cov stainless hlau welded sib koom ua ke ua tau raws li astm A403, MSS SP-4, ASTM B16.9 (tshwj tsis yog cov phab ntsa), thiab MSS SP-43.

High Quality Necked Taub Qab Taub Qab Bedd Neck poj niam Xov Ntiab Xov Xwm Qhov Muag Tsis Pom Flange - Zhengzhou Huitong Pipeline Equipment Co., Ltd.

Alloy 800 yog npib npib tsib xee-chromium alloy nrog siab zog thiab kev tiv thaiv zoo rau oxidation thiab corrosion ntawm qhov kub. ASTM B407 UNICS NC08800 INCOLOY 800 W. NR. 1.4876 Welded yeeb nkab yog dav siv rau kev tsim kho cov khoom siv uas yuav tsum tau ua rau corrosion tsis kam, lub zog, thiab ruaj khov rau kev pabcuam txog 1500 ° F (816 ° C).

Qhov no alloy muaj lub zog siab tensile lub zog, ua nws cov kev xaiv kev lag luam tau rau cov marine engineering lub hom phiaj. WNR 2.4360 Flanges tiv thaiv chloride kev ntxhov siab corrosion cracking, ib qho teeb meem uas ib puag ncig hauv cov av marine. Zoo li ntau npib tsib xee-muaj alloys, no alloy kev ua tau zoo ntawm cov kub hloov ntau cov hlau stainless allloys.

Cov khoom siv A182 F51 muaj cov pa roj carbon, 2% manghologes, Phosphorus, Sulfur, Chromium, chromium, 4.5% molybdenum thiab nitrogen nws.

Peb muab ASME SA335 Qib P22 Welded Yeeb Nkab, ASTM A335 P22 Yeeb tau tsim raws ASTM cov qauv. Alloy Steel A335 P22 ERW Tube, Astm A335 P22 Kub heev tsim, ua los ntawm cov hlau sawb kos los ntawm cov yob.

ASTM A193 Qib B7 Bolts thiab cov txij nkawm yog tsim los ntawm Chrome Molybdenum hlau thiab yog quenched thiab tempered (cua sov) kom ua tiav cov khoom siv xav tau (lub zog). Qib B7 yog cov feem ntau siv A193 ntsia liaj qhov rooj hauv kev tsim kho.

ASTM A312 TP316 yog tus qauv txheem rau kev sib khi, ncaj-leeg welded, thiab hnyav txias welded ustenitic kav hlau stainless hlau thiab kev corrosive service. Lub 316 seamless muaj steel yeeb nkab yog tsim los ntawm kev sib xyaw ntawm cov chromium, npib tsib, thiab molybdenum ua rau corrosion thiab xeb thiab xeb thiab xeb thiab xeb.

Inconel 718 Reducer yog npib tsib xee-based superalloy zoo tagnrho rau cov kev siv lub zog muaj qhov kub ntawm cryogenics mus 1400 degrees Fahrenheit.

Paub txog nws qhov kev cuam tshuam ntau lub zog, tsis muaj S32760 cov khoom pov thawj tsis muaj ductile-nkig kev sib tw, tab sis tsuas yog txo me me hauv kev cuam tshuam rau lub zog.

Tus Tee muaj peb txoj kev qhib, uas yog ib qho inlet thiab ob qho chaw tawm; Tshuaj lom neeg cov yeeb nkab haum nrog ob lub inlets thiab ib qho hluav taws xob, yog t-puab lossis y-puab

Inconel 718 yog npib tsib xee-chromium-based alloy uas feem ntau siv nyob rau hauv cov ntawv thov kub siab xws li aerospace thiab roj turbines. Ib qho ntawm cov tseem ceeb tshaj plaws hauv kev tsim cov astm b670 inconel 718 daim ntawv yog lub phaj dov. Muaj ob hom tseem ceeb ntawm inconel 718 daim hlau muaj nyob rau ntawm kev ua lag luam: kub dov thiab cov phiaj txias. Cov paib.

Tsis suav txog N08367 tseem hu ua Alloy Al6XN yog cov carbon ntau, siab purity, nitrogen-batoy nrog zoo heev rau chloride pitting thiab compevice corrosion.

Ua kom tiav thiab infinitely recaclable, stainless hlau yog lub ¡° ntsuab cov khoom siv. Qhov tseeb, nyob rau hauv kev tsim kho kev ua haujlwm, nws tus nqi rov qab tiag yog ze rau 100%.

Inconel 600 puag ncig bar yog npib tsib xee-raws li benign carburization thiab zoo heev corrosion thiab kub heev. Inconel 600 cov khoom sib txuas ua haujlwm tiv thaiv kom qhuav cl2 thiab ntau lwm cov roj sib txawv ntawm cov mob me thiab kub. Alloy 600 Bar yog npib tsib xee-chromium alloy nrog zoo oxoidation decomposition decomposition decomposition thiab acid oxidation ntawm ntug dej kub.

Qhov no muab kev txhim kho zoo heev rau cov sulfuric acid. Nws kuj tseem muaj cov ntsiab lus chromium siab, kom ua kom zoo dua rau oxidizing tshuaj lom neeg cov tshuaj lom kabmob uas muaj kuab lom thiab yaj oxygen.

SMO 254 Cov kav dej tuaj yeem tiv taus cov kev ntxhov siab ntawm cov neeg muaj kev ntxhov siab thiab alloy 254 smo yeeb nkab siab ua haujlwm nyob rau hauv cov kub thiab xeb ib puag ncig.

Hom flange yuav muab welded rau ib qho yeeb nkab lossis haum nrog ib leeg nkag mus, v weld (buttweld).

304 Piping spools yog tsim los ntawm 304 stainless hlau, ib qho khoom siv nrov thiab nrov tshaj plaws hauv ntau cov ntawv thov uas xav tau kev tiv thaiv kom xeb thiab oxidation. Cov kev tshaj lij no yog preooss siv cov machinery thiab cov txheej txheem tshwj xeeb, uas paub meej tias lawv muaj tseeb thiab ntseeg tau.
Lub ASTM A790 Duplex Welded Kav yog ib qho piv txwv ntawm welded duplex yeeb nkab. Muaj ntau cov qhab sib txawv ntawm cov kav dej duplex nrog cov khoom sib txawv cov khoom siv. Muaj cov yas, super duplex thiab leny Pawg nyob rau hauv lub duplex kav ntau yam. Lub Seamless Duplex kav yog ob qho tib si muaj zog thiab yog corrosion resistant.
Al6XN yog superaustenitic steel hlau nrog kev ua tau zoo rau chloride pitting, crevice corrosion thiab kev nyuaj siab corrosion tawg. Al6XN yog 6 Moly alloy uas tau tsim rau thiab siv hauv kev sib cav sib ceg siab. Nws muaj cov npib tsib xee (24%), Molybdenum (6.3%), nitriumen thiab chromium cov ntsiab lus tawg, thiab tshwj xeeb corrosion tiv thaiv. Al6XN yog feem ntau siv rau nws cov kev txhim kho pitting thiab crevice corrosion tsis kam hauv chlorides. Nws yog ib qho tsim nyog thiab weldable stainless hlau.

Flanges uas tuaj yeem tiv thaiv cov chaw hnyav yog qhov hloov hluav taws xob hnyav lossis corrosive media los ntawm ib tus txheej txheem mus rau tom ntej no los ntawm Chrome alloy tubing.

Stainless hlau huv lub raj yog polished rau sab nraud thiab sab hauv mus rau cov qauv zoo tshaj plaws. Peb 20 qhov ntev ntawm polished od \ / tus id raj-/ id raj tau ua tau raws li ASTM A270 thiab 3A txoj kev ua kom huv. Lub raj mis qhuav, cov laj kab huv, lub tsev kho kom qhuav thiab lwm yam khoom siv rau kev lag luam thiab dej haus thiab biotechnology thiab biotechnology kev lag luam. Peb cov khoom lag luam raug tsim los txo cov chaw seem uas cov kab mob tuaj yeem tsim thiab khoom. Clamp-style huv huv lub fittings, yog tsim kom tawg, ntxuav thiab rov ua kom zoo dua rau cov khoom lag luam zoo tshaj plaws.