construction hoists and temporary elevators for exterior and interior use and component parts for such hoists and elevators, namely landing ramps, gate systems, motors, gear boxes, winches, motor controls and call systems

assembling, erecting, dismantling, maintaining, operating, repairing of construction hoists and temporary elevators used for construction for others and renting of such hoists and elevators

inspecting, testing, and design of construction hoists and temporary elevators for others