Coal resources; Mining rights; Convenience yield; Two-factor model.
煤炭资源；采矿权；便利收益；双因素模型。
However, the direct process, cracking method and hydrogenation of chlorosilanes were valuable because of less cost, high yield and convenience of continuous manufacturing.
而直接法、裂解法和还原法因其成本低廉，产率高，便于连续化生产，具有工业实用价值。
We made a convenience of the physiological characteristics and the combined functions of amino enzyme to strengthen the secondary fermentation of Baiyunbian liquor to improve liquor yield.
利用阿米诺酶的生理特性和复合功能，强化白云边酒酿造后轮次发酵，提高出酒率。
The merit of the approach lies in convenience, high yield rate, satisfactory isolating effect, and the method is well suited to chemistry experiment teaching.
该方法的优点在于简便易行，得率较高，分离效果好，适合用于化学实验教学中。
The utility model has the advantages of simple structure double purposes in one machine, agility and convenience, and the utility model reduce the pollution of cake materials and enhance oil yield.
该压饼机结构简单，一机两用灵活方便，减少了对饼料的污染，提高了出油率。
The preparation method in the invention features convenience and feasibility, lower cost and higher yield of hapten.
本发明制备方法简便可行、成本较低， 半抗原产率较高。
In comparison with other methods, the said method had some advantages thanks to its convenience in operation, high product yield...
与其他方法相比，该方法操作过程简便，产率较高，产物可作为聚合反应的单体原料。
In comparison with other methods, the said method had some advantages thanks to its convenience in operation, high product yield...
与其他方法相比，该方法操作过程简便，产率较高，产物可作为聚合反应的单体原料。
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