属于工程机械的挖掘机、装载机和凿岩钻机(包括牙轮钻机、旋挖钻机和潜孔钻机等),以其作业能力大,效率高而被广泛应用于国民经济的各个行业。这三类工程机械,同样也是矿山开采中的主力设备。主要承担钻探、挖掘、采掘和装卸任务,在矿山生产中的作用和地位十分重要。我们不妨把这些横跨矿山机械和工程 Excavators, loaders and rock drilling rigs (including roller rigs, rotary drilling rigs and downhole drilling rigs) belonging to construction machinery are widely used in various industries in the national economy due to their large operating capacity and high efficiency. These three types of construction machinery, is also the main mining equipment in the mining. Mainly undertake drilling, excavation, mining and loading and unloading tasks, the role and status of mine production is very important. We may wish to cross these mining machinery and engineering