TK-3 Type Vertical Axis Hydraulic Drill[J]. COAL GEOLOGY & EXPLORATION, 1988, 16(1): 57-60.
Citation: TK-3 Type Vertical Axis Hydraulic Drill[J]. COAL GEOLOGY & EXPLORATION, 1988, 16(1): 57-60.

TK-3 Type Vertical Axis Hydraulic Drill

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