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Welded structure soft rock drill pipe and bit

Welded structure soft rock drill pipe and bit, Total:1 items.

In the international standard classification, Welded structure soft rock drill pipe and bit involves: .

Professional Standard - Coal, Welded structure soft rock drill pipe and bit

• MT/T 904-2002 Welded drill rod and bit for low-compressive strength rock

Others:   Welded structure soft rock drill pipe and bit.