Sissejuhatus:
Crawleri kallur on spetsiaalne põllukatte tüüpi, mis kasutab kummiradasid, mitte rattaid. Jälgitud kalluritel on rohkem funktsioone ja paremat veojõudu kui ratastega kalluritel. Rubber treads on which the machine's weight may be uniformly distributed give the dump truck stability and safety when going over hilly terrain. See tähendab, et eriti kohtades, kus keskkond on tundlik, saate kasutada roomajate kallureid mitmesugustel pindadel. At the same time, they may transport a variety of attachments, including personnel carriers, air compressors, scissor lifts, excavator derricks, drilling rigs, cement mixers, welders, lubricators, fire fighting gear, customized dump truck bodies, and welders.