礦用打點(dian)(dian)器(qi)又(you)稱為(wei)拉點(dian)(dian)器(qi),與(yu)拉引信(xin)號開(kai)(kai)(kai)關屬于同一種功能,取代(dai)了(le)拉引信(xin)號開(kai)(kai)(kai)關,適用于煤礦井下,作為(wei)低壓(ya)開(kai)(kai)(kai)關控制(zhi)防爆(bao)電鈴(ling)和(he)其它小(xiao)型音響設備、照明(ming)信(xin)號裝置(zhi)(zhi)等(deng)用,也可作井下提升(sheng)系統(tong)的信(xin)號打點(dian)(dian)裝置(zhi)(zhi)
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