Best Auto purchases used construction machinery (especially Rough Terrain, Truck, Crawler cranes) and exports all over the world

Crawler crane has caterpillar wheels.
It's suitable in the soft ground since ground pressure can be reduced.
But it can’t drive in the city and its boom need to be took apart
and carried separately.
Crawler crane doesn’t have a mechanism for regular driving,
but it is made of simple and strong structure,
therefore it's still active in working fields even after decades.