The electric wire rope hoist model CD1and MD1 have the features of compact. Light small-sized shape and smooth operation. It can be used not only on the overhead rails. But also be used in conjunction with many types of electric or manical cranes such as the single-girdercrane. The doublegirder crane. The cantilever crane and the gantry crane. The electric hoist model Md1 with two lifting speeds should be used in cases where the hoist model CD1 with single speed cannot meet the requirements for adjustments during precision operations.