Min. Order Reference FOB Price
1 Piece US$2,880.00-2,950.00 / Piece
Product Description
MRS Overburden Concentric Symmetric Casing Drilling System Bit for Coal Mining Product Description MRE Concentric under reaming drilling system is designed for unstable ground conditions. In the process of drilling, it could carry down the casing pipe to the hole to protect wall to achieve ...