Into the switchroom by the first switch, over a period of time off.
到的第一个开关开关室，在一段时间内远的。
2
The switchgear is preferably to be erected on a foundation frame set into the switchroom floor. The guideline structural data listed below facilitate a rough calculation of the space required.
开关柜应在直立的情况下进入室内，它的结构数据可在产品使用说明书中估算。
3
She groped blindly for the light switch in the dark room.