地下煤矿 meaning in English

underground coal mine

Belt conveyors for underground coalmining - coating on idlers - requirements and testing
地下煤矿开采用带式输送机.托辊的涂层.要求和检验
Steelcord conveyor belts for use in underground coal mining ; belt joints ; dimensions , requirements
地下煤矿用钢丝绳传送带.传送带的带接尺寸要求
Belt conveyors for underground coal mining - pressure rollers dn 159 - dimensions , requirements , marking
地下煤矿开采用带式输送机. dn为159的压辊.尺寸要求
Explosibility of coal dust in underground hard coal mining - tests and assessments of coal dust - air - mixtures and hybrid mixtures
地下煤矿煤尘易爆性.煤尘空气混合气体和混合物的试验
Kkl102 air refrigerator for mines application is used to lower tempdrature of underground coal mines , and it can decrease the temperature of mining work surface of 14 ? section from 32 to below 26 rapidly
Kkl102矿用空气制冷机用于降低地下煤矿工作面的温度，能迅速将断面为14 ?的掘进工作的温度由32降到26以下。