“prop-free”的概念、定义、翻译、参考文献-科学参考

单词	prop-free
释义	prop-free [`präp ´frē] ^{MINING ENGINEERING} A face with no posts between the coal and the conveyor used to remove it in longwall mining of a coal seam.
随便看	force gage force main force piece force plate force plug force polygon forceps force pump force ratio force-time forcing forcing cone forcing fan forcipate forcipate trophus Forcipulatida ford fording depth fore forearm forearm circumference forearm length forebay forebody forebrain

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