Truck bed-mounted material handling machinery primarily for use in the construction materials delivery industry, namely, hydraulic extendable material conveyors, mechanical extendable material conveyors, and truck bed material lifting platforms

Truck bed-mounted material handling machinery primarily for use in the construction materials delivery industry, namely, hydraulic extendable material conveyors, mechanical extendable material conveyors, and truck bed material lifting platforms; Pneumatic piercing machinery and auxiliary supportive devices used in the installation or replacement of utility pipe lines, cable lines, pipe tunnels and underground utility systems