并列安装的拉线开关的相邻间距不小于20mm；

Ceiling switch of parallel installation should be more than 20mm away from each other.

它可以克服现有拉线开关当遇到停电时很难确定开关是处于“开”还是“关”的状态。

The utility model overcomes the defect that the switch is in a state of opening or a closing when the existing bracing wire switch meets power cut.

拉线开关型，延时定时器型、湿度探测型供用户选用安装。

Delay electronic timer, humidistat &delay electronic timer models are available.

拉线开关型, 延时定时器型、湿度探测型供用户选用安装.

Delaytimer, humidistat & delay electronic timer models are available.