Kev nyab xeeb kev sib qhia
Kev nyab xeeb rau tib neeg tus cwj pwm
Ib tus neeg ua haujlwm ua txhaum txoj cai thiab hnav ris tsho tsis raug mob (hnav tsis raug mob) thaum ua haujlwm;
Thaum ua tsis tiav ntawm qhov hloov pauv lub nruas pom, nws tsis tau nres rau kev pov tseg. Txoj phuam qhwv txoj hlua khi rau hauv lub nruas hloov mus rau lwm qhov, ua rau ua pa thiab ua pa tsis nco qab, uas yog qhov ncaj qha rau qhov xwm txheej no
Lub xeev tsis muaj kev nyab xeeb ntawm kev ua haujlwm
Cov khoom siv muaj qhov muaj peev xwm ua kom muaj kev nyab xeeb: thaum cov khoom siv raug teeb tsa rau ntawm qhov chaw, cov hlau saw yog qhov tsis muaj dab tsi nrog qhov dav ntawm 37cm thiab nyob ntawm kev ua haujlwm ntawm cov neeg ua haujlwm. Ntu no tsis tshem tawm, thiab photoelectric interlock tiv thaiv cov khoom siv tsis raug teeb tsa ua raws li tus qauv tsim ntawm cov khoom siv kev nyab xeeb. Cov hlua hlau phom yog cov ntawv npog kev nyab xeeb rau kev teeb tsa. Txoj phuam qhwv tau khi rau hauv" cov menyuam hauv cheeb tsam" ;, ua rau muaj xwm txheej.
