Kev txhais lus rau mining machinery

Cov Lus Txhais: machinerydirectlyusedinoperationssuchasmineralextraction.Incawvminingmachineryandoreprocessingmachinery.Broadlyspeaking, prospectingmachineryalsobelongstominingmachinery.Inaddition, alargenumberofcranes, conveyors, ventilatorsanddrainagemachineryarealsousedinmineoperations.