16MnDG無縫鋼管,高壓合金管,16Mn厚壁無縫鋼管,高壓管,低溫管,厚壁無縫鋼管,化肥專用管,地質(zhì)管,螺旋管,石油裂化管,液壓支架管,流體管、不銹鋼管等 產(chǎn)品材質(zhì)規(guī)格價格 Dz60地質(zhì)管Dz60169*16.93651 Dz60地質(zhì)管Dz6045*2.353871 Dz60地質(zhì)管Dz60300*103921
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