“sandbag”的概念、定义、翻译、参考文献-科学参考

单词	sandbag
释义	sandbag [`san´bag] ^ENGINEERING A bag filled with sand; used to build temporary protective walls. ^GEOLOGY In the roof of a coal seam, a deposit of glacial debris formed by scour and fill subsequent to coal formation.
随便看	foot gland foot guard foothills foot holes footing footlambert foot length footpad footpoint foot-pound foot-poundal foot-pound-second system of units footprint foot rot foot screw foot section foot's oil footstock foot valve footwall footwall shaft forage Foraky boring method Foraky freezing process foramen

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