采用黄土薄壁取土器取样的钻孔，钻探时采用下列哪种规格（钻头直径）的钻头最合适？ (A) 146mm (B) 127mm (C) 108mm (D) 89mm

作者: tihaiku 人气: - 评论: 0

问题采用黄土薄壁取土器取样的钻孔，钻探时采用下列哪种规格（钻头直径）的钻头最合适？ (A) 146mm (B) 127mm (C) 108mm (D) 89mm

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答案 A

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