By adopting the method, liquid-phase ethylene which is from the bottomof the light component removal column can be sent to the condenser of the light component removal column through the delivery line; as the pressure and temperature of the liquid-phase ethylene at thebottom of the light component removal column and the finished liquid-phase ethylene in the return tank are almost the same, the liquid-phase ethylene at the bottom of the light component removal column can be used for the refrigeration of the condenser by relying on the evaporation of liquid-phase ethylene so as to make reasonable use of the liquid-phase ethylene at the bottom of the light component removal column. Therefore, the method can not increase the load of the purifying column and the propylene refrigeration system.
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Methods: Senile rats model was established by adopting the method that injected D-galactose subcutaneously in nape.
方法：采用D -半乳糖颈后皮下注射的方法，造成亚急性衰老动物模型。
The formula of anticipant control moment is deduced by adopting the method of exponent reaching law and twitter reducing of boundary layer.
并研究了姿控发动机的配置特点和点火逻辑，给出了由期望力矩计算实际控制力矩的方法。
Starting this year, China will follow standard international practices by adopting the method of outstanding balance management for its national debt.
从今年开始，参照国际通行做法，采取国债余额管理方式管理国债发行。
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