





a joint-stock com-pany under the control of ShanghaiPangtong Business Enterprise Dev.Co., Ltd (Group) for specialized manu-facturing and develop-ment of oilfieldwellhead products.Shanghai WellheadPetroleum Machinery Co., Ltd is anall-round corporation that performsopera-tion.
a joint-stock com-pany under the control of ShanghaiPangtong Business Enterprise Dev.Co., Ltd (Group) for specialized manu-facturing and develop-ment of oilfieldwellhead products.Shanghai WellheadPetroleum Machinery Co., Ltd is anall-round corporation that performsopera-tion,
a joint-stock com-pany under the control of ShanghaiPangtong Business Enterprise Dev.Co., Ltd (Group) for specialized manu-facturing and develop-ment of oilfieldwellhead products.Shanghai WellheadPetroleum Machinery Co., Ltd is anall-round corporation that performsopera-tion,
a joint-stock com-pany under the control of ShanghaiPangtong Business Enterprise Dev.Co., Ltd (Group) for specialized manu-facturing and develop-ment of oilfieldwellhead products.Shanghai WellheadPetroleum Machinery Co., Ltd is anall-round corporation that performsopera-tion,