“herringbone timbering”的概念、定义、翻译、参考文献-科学参考

单词	herringbone timbering
释义	herringbone timbering [`her·iŋ´bōn ¦tim·bǝ·riŋ] ^{MINING ENGINEERING} A method of timber support in a roadway with a weak roof and strong sides, using neither arms nor side uprights; the crossbar is notched into the sides and supported at its center by a bar under it and parallel with the roadway; the bar is supported by struts notched into the sides at about half height.
随便看	forge delay time forge welding forging forging brass forging hammer forging plane forging press forging range forging rolls forging stock forked lightning fork-join model forklift forklift truck fork oscillator fork pocket fork truck form formability formal charge formaldehyde formaldehyde sodium bisulfite formalin formality formal language

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