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ASTM A790 Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel P...
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seamless tubing pipe 1.J55,K55,N80,L80,P110 2.OD:33.4-114.3mm 3.NUE, EUE 4.len...
Qingzhou Yongsheng Machinery Co.,Ltd is one of the professional China automatic coal ...
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crude oil drilling equipment octg pipe drill tubing collar Product Name crude oil d...
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