矿井设备 meaning in Chinese

pit gear

Their processing quality directly decides the service life , performances and safety of mining machines
它的加工质量直接关系矿井设备的寿命、机器的性能和安全性。
Coal fire retardant agents , instrumentation , mine processing equipment and accessories sales ; because of technical advisory services ; mine works
煤炭阻燃剂、仪器仪表、矿井设备及配件加工销售；矿井技术咨询服务；矿井工程施工。