“face timbering”的概念、定义、翻译、参考文献-科学参考

单词	face timbering
释义	face timbering [`fās `tim·bǝ·riŋ] ^{MINING ENGINEERING} Positioning of safety posts at the working portion of a coal face to support the roof of the mine.
随便看	nonessential amino acid noneuclidean geometry nonexecutable statement nonexpendable nonfaradaic path nonfatal error nonfeasible method nonferrous metal nonferrous metallurgy nonflowing well nonfluent aphasia nonfragmenting projectile nonfreezing explosive nonfrontal squall line nonfunctional packages software nongonococcal urethritis nongraded nongranular leukocyte nongraphic character nonhistone protein nonholonomic constraint nonholonomic system nonhoming nonhoming tuning system nonhypergolic

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