study on process variables for dimethyl ether synthesis from syngas 合成气直接合成二甲醚的工艺研究
number of orders processed variable 处理的定制数目(变量)
as the name of this process variable 作为流程变量名。
this is the desired value of a process variable which cannot be changed by the operator during execution 每次运行都需要改变的过程设定值,而且通常必须由操作员来输入。
this is the desired value of a process variable which may change from run to run and must usually be entered by the operator 每次运行都需要改变的过程设定值,而且通常必须由操作员来输入。