Hole Opener multi - cones 32' Drill Bit Tricone Drilling ...
Hole opener for enlarge a small well hole to bigger diameter in construction field, bridge construction, super highway construction, railway construction etc. This kind of bits are suitable for different complex formation, shale, limestone, cobblestone, dolomite, chert, etc. Main Type Available Regular Bit Diameters: 28', 32', 36', 38', etc, and any diameters can be customized, maximum diameter is …
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