Cov chains rau lifting yog ib qho kev tsim tshiab, los ntawm kev ua haujlwm zoo heev thiab cov khoom siv raw khoom zoo, kev ua haujlwm ntawm chains rau kev nqa mus rau tus qauv siab dua. Peb yog zoo meej rau txhua yam ntawm cov chains rau lifting , lav cov qib zoo, thiaj li coj koj cov khoom zoo meej kev paub. Lishenflex yog cov kws tshaj lij Tuam Tshoj cov khoom siv nqa nqa cov chaw tsim khoom thiab cov chaw muag khoom, yog tias koj tab tom nrhiav cov saw zoo tshaj plaws rau nqa nrog tus nqi qis, sab laj nrog peb tam sim no!