Gem grade diamond can be synthesized by selecting proper processing parameters.
合理的选取工艺参数，有利于合成优质金刚石。
A fundamental criterion for selecting a proper model in specified experiment requires the unbiased estimates of parameters in the model.
一个好的实验模型选择的主要准则之一，是模型中参数的估值应该是无偏的。
The corrosion can be controlled by selecting proper material for transitional section reformer tubes and strict control of reformer operating parameters.
控制原料气中氯离子含量，选择适宜的过渡段炉管材质以及严格控制转化炉运行参数，可使腐蚀得到控制。
The corrosion can be controlled by selecting proper material for transitional section reformer tubes and strict control of reformer operating parameters.
控制原料气中氯离子含量，选择适宜的过渡段炉管材质以及严格控制转化炉运行参数，可使腐蚀得到控制。
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