... bridge should be strictly according to GB6067-1985 "crane safety regulations" if it is used in open ... electrical control devices. MD1, HMD1 electric wire rope hoist is based on CD1, which changes hoisting mechanism ... up or down. Lifting height H = 6m, when Crane capacity <10t, we should use a elastic coupling ... would prevent steel wire rope mess aroundWhen H ≥ 9m, crane ≤ 10t; H ≥ 6m, weight ≥ 12.5t, ...