Machines easy to operate, operation button on the operation of me.

机器操作方便，操作按钮集中在操作箱上。

youdao

Hardly had the operator pressed the button before all the machines began to work.

操作人员一按电钮，所有的机器就开始运行。

youdao

Hardly had the operator pressed the button before all the machines began to work.

操作人员一按电钮，所有的机器就开始运行。

youdao