In {HEAD ~ a specialized hopper truck} having {TAIL ~ a large sloped hopper} for sand/salt and a belt conveyor in the bottom of the hopper for conveying sand/salt to the back of the truck for discharge into a spreader hopper 
having
In { HEAD ~ a specialized hopper truck } having { TAIL ~ a large sloped hopper } for sand / salt and a belt conveyor in the bottom of the hopper for conveying sand / salt to the back of the truck for discharge into a spreader hopper
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH