1. Swing Safety Switchs: Viav vias kev ruaj ntseg keyboards feem ntau yog ntsia ntawm lub inlet thiab qhov hluav taws xob ntawm rotating tshuab. Thaum lub tshuab ua haujlwm, qhov hloov pauv tau hloov pauv, muab kev tswj hwm kev nyab xeeb.
2. Xauv Kev Ruaj Ntseg Hloov: Xauv qhov hloov pauv kev nyab xeeb tiv thaiv kev ua haujlwm tsis raug lossis yuam kaw. Thaum lub tshuab nyob rau hauv standby lossis nres hom, qhov hloov pauv tau xauv thiab tsuas yog xauv nrog tus yuam sij.
3. Pull-Rope Safety Switch: Rub- hlua kev nyab xeeb hloov siv txoj hlua los ua ib qho khoom siv. Cov neeg ua haujlwm yuav tsum rub txoj hlua los pib lub tshuab, ua kom cov neeg ua haujlwm muaj kev nyab xeeb.
