HT Cov Yeeb Nkab Cov Khoom Siv Hlau Hlau & Hlau Tube nrog cov qauv ASME B36.10 thiab ASME B36.19. Cov yeeb nkab siv rau kev xa cov khoom nruab nrab, lub raj siv rau kev sib pauv cua. Cov Kev Siv Cov Kav Hlau Hlau yog nyob rau thaj chaw ntawm cov kav dej, kev lag luam raj, siv cov pa yeeb yaj kiab, ua lag luam,
- zhengzhou huitong pipeline khoom Co., Ltd.