ANSI B16.5 Carbon Steel Flanger Producent, ASTM A05, ASTM A350, ASTM A694 F52, F56, F60, F65, F70, WN Flanges, LWN Flanges, SW -flanger, trådede flanger, blinde flanges, så flanges, skød Joint flanger, plade flanger Face
- Zhengzhou Huitong Pipeline Equipment Co., Ltd.