Semi-Trailers: Types And Maintenance
A semi-trailer is a type of trailer where the front axle is absent. A significant proportion of its weight is carried by a road tractor, a front axle assembly which is detachable and termed a dolly, or even the tail belonging to another trailer. A semi-trailer usually comes with a landing gear which supports it when uncoupled. Legs of the landing gear can be lowered for support. A semi-trailer truck is a road [...]