We are offering coal drilling pipe. Specifications coal mining drilling pipe 1).all sorts of dth drill pipes 2)large in stock coal mining drilling pipe we have specialized in casing pipe for years. The quality of our casing pipe is high. We can not...
we are established in 1994. We can produce sawh ssaw dsaw hfw spiral pipes comply with standards of api 5l.astm a252, astm a139, awwa c200, din2440, bs524, is2062, outside diameter: 219 mm to 3220mm, pipe thickness: 5mm to 26mm (0.236-0.708inch),...
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