拉绳开关，跑偏开关XCRA15，说明书 上海临嘉科教仪器有限公司

p1Src=//y1.yzimgs.com/uploads/391770/20180123-09112751.jpg&p2Src=//y1.yzimgs.com/uploads/391770/20180123-56867206.jpg&p3Src=//y1.yzimgs.com/uploads/391770/20180123-56867206.jpg