Widely used in CBM wells, oil exploration and development.
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Suitable for relatively fractured medium-hard to hard formations
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Suitable for coal seams (most coal seams) and their roof and floor.
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Soft clay, shale and loose sand
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Hard sandstone, limestone, granite and chert
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Geological exploration and core sampling
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Coal mining, tunneling, road milling and trenching
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Main cutting, impact zones and hard interlayers
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