Презентация, доклад для СПО Английский язык на тему :Трактора

of tractors
5 Tractors, agriculture and aerospace
6 Virtual tractors

the vehicles used on farms. The farm tractor is used for pulling agricultural machinery or trailers, for ploughing, harrowing and similar tasks. The classic farm tractor is a simple open vehicle with two very large driving wheels on an axle below and slightly behind a single seat (the seat and steering wheel consequently are in the center) and the engine in front of the driver with two steerable wheels below the engine compartment.

suitable for engineering tasks. Tractors can be attached with different engineering tools such as dozer blade, bucket, hoe, ripper and so on. The most common attachments for the front of a tractor are dozer blade or a bucket. When attached with engineering tools the tractor is called an engineering vehicle.
A bulldozer is a tracked-type tractor attached with blade in the front and a rope-winch behind. Bulldozers are very powerful tractors and have excellent ground-hold, as their main tasks are to push or drag things.
Bulldozers have been further modified over time to evolve into new machines which are capable of working in ways that the original bulldozer can not. One example is that loader tractors were created by removing the blade and substituting a large volume bucket and hydraulic arms which can raise and lower the bucket, thus making it useful for scooping up earth, rock and similar loose material to load it into trucks.

is the loader-backhoe, also called a backhoe-loader. As the name implies, it has a loader assembly on the front and a backhoe on the back. When both the loader and the backhoe are permanently attached it is almost never called a tractor, not generally used for towing and usually does not have a PTO. When the backhoe is permanently attached, the machine usually has a seat that can swivel to the rear to face the hoe controls. Removable backhoe attachments almost always have a separate seat on the attachment itself.
Backhoe-loaders are very common and can be used for a wide variety of tasks: construction, small demolitions, light transportation of building materials, powering building equipment, digging holes, breaking asphalt and paving roads.

tractor
heavy-duty vehicles with large engines and several axles. These tractors are designed to pull long road trailers, most often for the transport of freight of some kind over a significant distance

locomotive tractor (engines)
the amalgamation of machines , generators, controls and devices that comprise the traction component of railway vehicles
artillery tractors
highly-specialised vehicles used to tow guns of varying weights.

propellers being in front of the fuselage or wing. Conversely, if to the rear, it is a called a pusher configuration.
NASA and other space Agencies use very large tractors to ferry launch vehicles like booster rockets and space shuttles from their hangars to (and in rare cases, from) the launchpad .
Space technology has also trickled back down to agriculture in the form of GPS devices, and robust on-board computers installed as optional features on farm tractors. The spin-offs from the space race have actually facilitated automation in plowing and the use of driverless drone tractors that work in tandem with manned tractors on large corporate-scale farms.

beam and other means to achieve traction in the low gravity of virtually empty space as Humans begin to mine the asteroid belt and plant crops on the Moon and Mars More practical, is the cyberspace expansion of the term to include file or packet tractors within the transport layer of the OSI Model. This falls into the budding field of internet mechanics evolving conceptually from the tractor as a part of a printer that transports paper through the printer. Compare the adaptation of the term TTY still in use long after the Teletype machine faded into obsolescence.