规格:1/8",1/4",3/8",1/2",3/4",1",11/4",11/2",2",21/2",3",4".
材质:AISI A312 304,304L,316,316L;碳钢20#,25#,40#
压力:150#,300#
螺纹:符合美标AISI,德标DIN,日标JIS,英标BS,国标GB