Description
Tianjin Grand Construction Machinery Technology Co., Ltd. deeply engaged in rock breaking tools more...
These Grand tungsten carbide insert bits are used to drill soft formation with low compressive strength and high drill ability, such as shale, clay, sandstone and soft limestone, etc.
These ROCK bit tricone are used to drill soft formation with low compressive strength and high drill ability, such as shale, clay, sandstone and soft limestone, etc.
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