time-switch

n switch that can be set to operate automatically at a certain time （自动）定时开关: The central heating is on a time-switch. 集中供热设备是定时开关的.

timbered, timbre, time, time bomb, time exposure, time warp, time zone, time-card (also `time-sheet), time-consuming, time-fuse, time-honoured (US time-honored), time-lag, time-limit, time-saving, time-scale, time-server, time-serving, time-sharing, time-sheet, time-signal, time-table, time-worn, timekeeper, timeless, timelessly, timelessness, timeliness, timely, timepiece, timer, times, timetable, timetable (also esp US schedule), timeworn, timid, timidity, timidly, timing, timorous, timorously,