Lub 2 nti ratchet khi down straps yog ib qho kev tsim tshiab, los ntawm kev ua haujlwm zoo heev thiab cov khoom siv zoo, kev ua haujlwm ntawm 2 nti ratchet khi down straps mus rau tus qauv siab dua. Peb zoo meej rau txhua qhov nthuav dav ntawm 2 nti ratchet khi down straps , lav qhov zoo, thiaj li coj koj cov khoom zoo meej kev paub. Lishenflex yog ib tug kws Tuam Tshoj 2 nti ratchet khi down straps chaw tsim tshuaj paus thiab tsum, yog tias koj tab tom nrhiav rau qhov zoo tshaj plaws 2 nti ratchet khi down straps nrog tus nqi qis, sab laj nrog peb tam sim no!