[ Jacks in the nature of pneumatic jacks, hydraulic jacks; ] lifts, other than ski-lifts, namely, [ elevators, stair lifts, ] mechanical [ and hydraulic ] lifts; [ winches; roller bridges, namely, roller conveyers; ] hoisters, namely, mechanical and pneumatic hoisting apparatus; handling apparatus for loading and unloading, namely, loading and unloading machines; cranes; hoists [ and winches ] [; conveyors ]