...The drilling speed is about 1m per minute in granite. *Some of the terminology that mentions "auger" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…さく孔速度は,花コウ岩で毎分1m程度である。 ※「オーガー」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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