In order to attain the certain lump coal rate, the key is reasonable picks-lacing.
因而要达到一定的块煤率，关键是截齿的合理排列。
To attain the satisfied lump coal rate, the key is reasonable picks-lacing.
要达到满意的块煤率，关键是合理的截齿排列。
To attain the satisfied lump coal rate, the key is reasonable picks-lacing.
要达到满意的块煤率，关键是合理的截齿排列。
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