Harafin B2 EFF bututun yana da tsayayya sosai ga duk maida hankali da kuma yanayin zafi na hydrochloric acid.
Asme B36.19m ita ce madaidaiciyar ƙira don bututun ƙarfe na bakin ciki, wanda ke haifar da girma, haƙuri, da abubuwan sarrafawa don duka welded da balessan bututu.
Esperanto
Armeniyanci
Hmong
Slovak
Koguna 600 sun hada da chromum, nickel da molybdenum. Wannan yana sa waɗannan kusoshi suka fi ƙarfin bakin bakin ciki da ƙwallon ƙarfe na carbon. Tsawon waɗannan dabarar suna tsakanin 3mm da 200mm. Rashin daidaituwa 600 HEX Bolts suna da matuƙar tsayayya da lalata jiki da hadawa. An tsara waɗannan wasan don kula da matsanancin yanayin zafi da matsin lamba.
Basque
Azerbaijani