裴沟煤矿升级为煤与瓦斯突出矿井后，将架线电机车改为电瓶车牵引，设计并施工了充电硐室。

After Peigou coal mine raising to coal and gas outburst mine, the locomotive with power line is transformed battery locomotive, to construct and design a electrified chamber.

youdao

告成煤矿升级为煤与瓦斯突出矿井后，将架线电机车改为电瓶车牵引，设计并施工了充电硐室。

After Gaocheng coal mine raising to coal and gas outburst mine, the locomotive with power line is transformed battery locomotive, to construct and design a electrified chamber.

youdao

告成煤矿升级为煤与瓦斯突出矿井后，将架线电机车改为电瓶车牵引，设计并施工了充电硐室。

After Gaocheng coal mine raising to coal and gas outburst mine, the locomotive with power line is transformed battery locomotive, to construct and design a electrified chamber.

youdao