英语词汇“second mining”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	second mining
释义	second mining second mining [′sek·ənd ′mīn·iŋ] (mining engineering) In underground coal mining, a procedure in which the pillars left for roof support are removed as mining operations move back out of the previously mined area.
随便看	sitting room sitting-room sitting rooms sittings sitting someone down sitting still for sitting tall in her saddle sitting tall in his saddle sitting tall in my saddle sitting tall in one's saddle sitting tall in our saddle sitting tall in our saddles sitting tall in their saddle sitting tall in their saddles sitting tall in the saddle sitting tall in your saddle sitting target sitting targets sitting tenant sitting tenants sitting them down sitting through sitting tight sitting trot sitting up

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