Description
Grain and Seed Cleaning Equipment is one type of the important agricultural machineries, which have helped farmers to increase the yield and easily harvest the crops and hence earn healthy profits. Grain and Seed Cleaning Equipment are unavoidable ones in agricultural industry since it has led to significant decrease in turnaround time post harvesting. The equipment helps to speed up the processing of seeds and grains. A wide variety of machines are available depending upon the type of crop and operational requirement. 
Description
"A semi-trailer is a trailer without a front axle. A large proportion of its weight is supported by a tractor unit, a detachable front axle assembly known as a dolly, or the tail of another trailer.

A semi-trailer is normally equipped with landing gear (legs which can be lowered) to support it when it is uncoupled."