astm/asme a105 class 150 sch 40 ff rf weld neck flange
双头管外丝npt75长64kg高压管件sch40焊接304316l天佑管业11545
6成交0千克316不锈钢管道 sch40 20 a 3/4" dn20 3
双头管外丝bspt300长64kg高压管件sch40焊接304316l天佑管业11543
单头管外丝npt50长耐64kg高压管件sch40焊接304316l加厚短节
astm/asme a105 class 150 sch 40 ff rf weld neck flange
双头管外丝npt75长64kg高压管件sch40焊接304316l天佑管业11545
6成交0千克316不锈钢管道 sch40 20 a 3/4" dn20 3
双头管外丝bspt300长64kg高压管件sch40焊接304316l天佑管业11543
单头管外丝npt50长耐64kg高压管件sch40焊接304316l加厚短节