“heading-overhand bench method”的概念、定义、翻译、参考文献-科学参考

单词	heading-overhand bench method
释义	heading-overhand bench method [¦hed·iŋ `ō·vǝr´hand `bench ´meth·ǝd] ^{MINING ENGINEERING} A tunneling method in which the heading is the lower part of the section and is driven at least a round or two in advance of the upper part (bench), which is taken out by overhand excavating. Also known as inverted heading and bench method.
随便看	pilothouse piloting pilot lamp pilotless aircraft pilot light pilot lightship pilot line operation pilot materials pilot model pilot motor pilot plant pilot production pilot reaming bit pilot relaying pilot report pilot rules pilot-scale chemical reaction pilot station pilot streamer pilot system pilot test pilot tone pilot tunnel pilot vessel pilot waters

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