Otu akụkụ nke e ji akwa
Nke anyiOtu akụkụ nke e ji akwaEjiri ihe dị elu, gụnyereASTM A234 WPBnaASTM A105, nke kwekọrọ
Rue ụkpụrụ dị iche iche dị ka ASI, Jis, JIs, EN, API 5L, wdg. Ewepula ISO9000
Asambodo usoro dị mma. Ntụkwasị obi na aka anyị ma sie ike na ngwaahịa anyị na-ezute ụkpụrụ ụlọ ọrụ kachasị elu.
Dee ozi gị ebe a ma zigara anyị ya