Dragline including improved boom

Dragline including improved walking mechanism

Dragline rotating frame structure

Draw bar sling

Dredger

Drill extractor

Drill retriever

Drilling deep wells for oil, gas, sulfur and the like

Drive means for cable-mounted vehicle

Drive mechanism for jib cranes

Drive unit for transport trolley

Drum clamping unit for "l" ring drum

Drum grasping device

Drum gripper

Drum handling sling

Drum lifting apparatus

Dual weight assembly for a crane

Dust collecting bag

Dynamic braking system for a motorized lifting mechanism