Marka ng Bakal: Q195–Q345,S235JR,GR.BD,STK500 Standard:GB/T3091–2001,BS1387–1985, DIN EN 10025,EN10219,JIS G3444:2004, ASTM A53 SCH40/BS502 Ibabaw Tapos na:pre galvanized ,threaded,socket,engraved, painted Outer diameter (inch ):1/2''—4'' Thicknes...
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