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2. Tractor unit - Wikipedia

   en.wikipedia.org/wiki/Tractor_unit

   Peterbilt 386 sleeper-cab–style commercial 6×4 tractor unit. A tractor unit, also known as a truck unit, lorry unit, power unit, prime mover, ten-wheeler, semi-tractor, semi-truck, semi-lorry, tractor cab, truck cab, lorry cab, big rig tractor, big rig truck or big rig lorry or simply a tractor, truck, lorry, semi, big rig or rig, is a characteristically heavy-duty towing engine that ...

3. Unit Rig - Wikipedia

   en.wikipedia.org/wiki/Unit_Rig

   This Unit Rig BD30HD haul truck was assembled at Jacobs Ranch Mine and operated for 20,000 hours hauling 10 million tons of coal. It is now on display at the outdoor Energy Equipment Exhibit museum in Gillette, Wyoming. Unit Rig Lectra haul truck 143 is on display at the Wright Centennial Museum in Wright, Wyoming. Its gross empty weight is ...

4. Radio-frequency welding - Wikipedia

   en.wikipedia.org/wiki/Radio-frequency_welding

   Radio-frequency welding, also known as dielectric welding and high-frequency welding, is a plastic welding process that utilizes high-frequency electric fields to induce heating and melting of thermoplastic base materials. [1] The electric field is applied by a pair of electrodes after the parts being joined are clamped together.

5. Mack Trucks - Wikipedia

   en.wikipedia.org/wiki/Mack_Trucks

   Mack Trucks is the fourth-largest employer in the Lehigh Valley region as of 2024. [6] Mack Trucks is one of the top producers in the vocational and on-road vehicle market, class 8 through class 13. [citation needed] Mack trucks have been sold in 45 countries.

6. Semi-trailer truck - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer_truck

   Conventional style cab tractor A cab-over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a ...

7. Service Rigs - Wikipedia

   en.wikipedia.org/wiki/Service_Rigs

   There are several specialized types of service rigs: the carrier, the pumptruck, the doghouse, a 5-ton equipment truck and several crew vehicles. The rigs usually travel in a convoy, because all of the component rigs are needed for proper oil well servicing. The crew use the equipment on the rigs to provide a variety of services, including ...