A mathematical model of relation between dust explosion rate on a coal face and design parameters of a shearer drum is set up by supposing and simplification in the paper.
通过假设与简化，建立了采煤工作面粉尘爆炸率与采煤机滚筒设计参数间关系的数学模型。
Presently since price for most products has been liberalized, it will not be conducive to fair competition between enterprises without simplification and adjustment in tax rate.
目前产品价格已大部分放开，如不简并、调整税率，将不利于企业公平竞争。
Presently since price for most products has been liberalized, it will not be conducive to fair competition between enterprises without simplification and adjustment in tax rate.
目前产品价格已大部分放开，如不简并、调整税率，将不利于企业公平竞争。
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