拉绳开关，跑偏开关LSKG-Ⅰ，原理 上海临嘉科教仪器有限公司

p1Src=//y1.yzimgs.com/uploads/391770/20180123-84946631.jpg&p2Src=//y1.yzimgs.com/uploads/391770/20180123-39491186.jpg&p3Src=//y1.yzimgs.com/uploads/391770/20180123-67403297.jpg