Min. Order Reference FOB Price
10 Pieces US$211.00-352.00 / Piece
Product Description
[Application scope] It is used for the construction of various types of boreholes in the fields of coal mines, geology, exploration, etc. It is suitable for the drilling of soft-medium hard (f≤8) formations, and should not be used in broken, fissured, and highly abrasive formations. [Design ...