Nyob rau hauv lub ntiaj teb no ntawm lifting khoom, hydraulic winches thiab hluav taws xob winches yog ob feem ntau siv.Thaum ob qho tib si ua haujlwm tib lub hom phiaj ntawm kev nqa cov khoom hnyav, lawv txawv ntawm ntau yam tseem ceeb xws li cov qauv kev ua haujlwm, kev siv sijhawm, kev thauj khoom, kev tu, thiab kev nyab xeeb....
Nyeem ntxiv