Kev yuav cov khoom siv hauv chav dej

1. Thaum xaiv lub txee chav dej, nws yog qhov zoo tshaj plaws los xaiv cov phab ntsa-mounted hom nrog lub siab txee siab lossis lub log kom zoo cais cov av noo.

2. Thaum yuav khoom, koj yuav tsum paub seb tag nrho cov hlau qhov chaw yog cov hlau tsis muaj dej tsis zoo, lossis cov khoom siv txhuas rau cov khoom siv hauv chav dej, txhawm rau ua kom cov dej tsis zoo.

3. Ua tib zoo xyuas qhov qhib ntawm lub dab da dej pob khawm. Yog tias qhov qhib qhov cub nce mus txog 180 degrees, nws yuav yooj yim dua los khaws thiab tso cov khoom. Qhov tseeb dua qhov hinges, qhov nruj dua lub qhov rooj txee yuav haum ua ke, thiab qhov tsawg dua nws yuav ua rau cov plua plav nkag mus.