7 Machines to Handle Roofing Material-Namely, Ladder Elevators and Scissor Lifts; on Deck Roof Equipment-Namely, Felt Laying Machines, Gravel Hoppers, Mopping Machines, Pumps, Bins, Hoppers, Conveyors, Pneumatic Nailing Machines and Stapling Machines; Portable Asphalt Melting Kettles