Lub tshuab nqa hydraulic siv nyob rau hauv ntau cov kev siv sib txawv as xws li cov chaw rau khoom ， tuam txhab ， chaw nres nkoj thiab lwm yam. tsa thiab txo qis rau tib neeg, khoom muag, thiab khoom siv.
Cim npe nrov: harbor nqa khoom nqa, Tuam Tshoj, tuam ntxhab, cov chaw muag khoom, kho kom haum
