7 Construction and pipeline specialty equipment, namely, pipelayers, padding machines, screening buckets, pipe bending machines, flat bed tractors, pipe carriers, welding tractors, welding cabins, pipe facing machines, vacuum lifts, wheel dozers, dumpers, lifting hooks, tracked tractors; power operated pipe laying equipment; Kit for converting pipelayer with mechanical winches to pipelayer with hydraulic winches; padding machines for adding screened or selected soil on pipeline in trench; vacuum lifts; suction pads for vacuum lifts; pipe bending machines; pipe carriers in the nature of a tractor for carrying pipes; pipe facing machines; pipeline accessories, namely, wedge mandrels, clamps, automated hydro-thrust cleaning units for pipelines; sifting machines; Gravel and dirt sorting and screening machines; sifting buckets; crimping machines; crushing machines; crushers; lifting beams for lifting pipes and heavy loads