Underground loader, professional name is LHD, load-haul-dump. LHD mainly used for underground mines, it can also be used for railway, highway and water conservancy tunnel projects, particularly suited to poor working conditions, working at narrow, low and muddy working sites. LHD has two series, one is diesel powered, and the other is electric. The diesel loaders usually are equipped with DEUTZ low pollution engine. It is very smart in the tunnel. The eclectic LHD has a long cable, so it is not as flexible as the diesel LHD. However, the electric LHD has no pollution at all.