| 摘要 |
PROBLEM TO BE SOLVED: To efficiently and deeply drill natural ground. SOLUTION: A seat frame 13 is assembled in inclined natural ground 1 requiring drilling, a sliding rail 18 is arranged at specific intervals up and down on the seat frame, at the same time, a leg material 17 of the sliding rail is mounted to a footing material 16 of the seat frame, a mounting sled 20 of a drilling machine A is placed while the mounting sled strides over at least two sliding rails, and a sled is horizontally and vertically slid by winding and rewinding a wire.
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