Sab saum toj Qib Tuam Tshoj Electric Screw Tsav, Peb cov khoom yog nrov heev nyob rau hauv lo lus, zoo li South American, Africa, Asia thiab hais txog.Cov tuam txhab "tsim thawj cov khoom lag luam" raws li lub hom phiaj, thiab siv zog los muab cov neeg siv khoom nrog cov khoom zoo, thiab cov neeg siv khoom sib koom ua ke, tsim kom muaj kev ua haujlwm zoo dua thiab yav tom ntej!