... up by ' I ' steel beam, it can also maked into electric or manual single-girder crane, double-girder crane, arm crane ... such as precise installing, clamping work, sand mode casting and so on, it needs to choose the MD1 wire rope electric hoist ... is double(8&0.8m/min).MD1 model double speed electric hoist Parameters: ModelMD1 0.5TMD1 1TMD1 2TMD1 3TMD1 5TMD1 10TMD1 ...