At present most of the existing domestic testing press, hot press are all manually operated, or use time relays, switches, etc. as control elements.

目前，国内现有的试验压机、热压设备多为手动操作，或采用时间继电器、行程开关等作为控制元件实现一定程度的自动操作。

youdao

Fyodorov was now in charge of a number of switches and the junior switchmen who operated them.

NEWYORKER: Among Animals and Plants

Hundreds of thousands of switches and circuit breakers must be operated manually, and the main transmission lines have little instrumentation to monitor the second-by-second flow of electricity from unpredictable new sources like windmills.

FORBES: Juicing the System