Kev nyab xeeb kev thauj mus los, tsis tsuas yog nyob rau hauv txoj kev ntawm kev tsav tsheb, tab sis kuj nyob rau hauv qhov chaw nres tsheb ntawm loading thiab unloading cov khoom inadvertently.Cov kev ceev faj txog kev thauj khoom hauv qab no, thov nug cov neeg tsav tsheb xyuas oh .
