Cat Trucks are on road trucks, which are typically used for pulling heavy containers and weight. The sizes and prices of Cat Trucks usually differ on how much weight the truck can pull.
By trucks and airplanes
For brand new heavy duty trucks, try Heavy Duty Trucks USA. Trucks Junction and 1 Used Trucks both sell used heavy duty trucks online for a cheaper alternative.
The services offered by Freightliner trucks are the sale of heavy duty trucks, parts and service. They manufacture the chassis, heavy duty trucks and semi-trailers.
Of course not.
You can find heavy trucks anywhere from searching online to going into a car dealership/shop itself and looking around at different heavy trucks that they have available.
Before airplanes, there were cars, trucks, horses, and trains, those were the main ways of transportation.
Thunders are good Independent trucks are good but are very heavy i don't think thunders have 20 dollar trucks and i wouldn't want heavy trucks
Petrol
Here is a site with info on used heavy duty trucks and even trucks for sale: http://www.1usedtrucks.com/heavy_truck_subcategory.php. You can also check Craigslist for trucks in your area.
Heavy box trucks can be found in used car lots in rural areas. Also many manufactures like Ford carry a line of heavy box trucks for use on farms. Checking you local truck dealers will be the best way to find these trucks.
Airplanes refuel in the ground. Trucks carrying airplane fuel come and refuel the aircraft.Some jet aircraft have the capability of refuelling in the air.