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halftrack
A half-track is a civilian or military vehicle with regular wheels at the front for steering and continuous tracks at the back to propel the vehicle and carry most of the load. The purpose of this combination is to produce a vehicle with the cross-country capabilities of a tank and the handling of a wheeled vehicle.
==Advantages==
The main advantage of half-tracks over wheeled vehicles is that the tracks reduced the pressure on any given area of the ground by spreading the vehicle's weight over a larger area, which gives it greater mobility over soft terrain like mud and snow, while they do not require the complex steering mechanisms of fully tracked vehicles, relying instead on their front wheels to direct the vehicle, augmented in some cases by track braking controlled by the steering wheel.
It is not difficult for someone who can drive a car to drive a half-track, which is a great advantage over fully tracked vehicles which require specialized training. Half-tracks thus facilitate moving personnel and equipment successfully across varying terrain.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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