Chengdu Derbo Steel Co., Ltd.

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S135 5-inch grade S tool joints NC 50 API 5D/API 5DP drill pipe	2-inch schedulebs1387 welded hot dipped galvanized steel pipes for greenhouse	Seamless pipe	ASTM A519 4145 seamless steel pipe
10-inch schedule 40 API 5L Grade X42 ERW line pipe	A519/4130 cold drawn steel tube	8-inch ASTM A335 P5 cold drawn seamless steel pipe applied for high temperature