Lub lifting chain tsum yog tus tsim qauv tshiab, los ntawm kev ua haujlwm zoo heev thiab cov khoom siv zoo, kev ua haujlwm ntawm kev nqa cov saw txuas mus rau tus qauv siab dua. Peb zoo meej rau txhua yam ntawm cov khoom siv nqa nqa , lav cov qib zoo, thiaj li coj koj cov khoom lag luam zoo meej. Lishenflex yog tus kws tshaj lij Tuam Tshoj lifting saw cov chaw tsim khoom thiab cov chaw muag khoom, yog tias koj tab tom nrhiav qhov zoo tshaj plaws lifting saw lwm tus neeg muag khoom nrog tus nqi qis, nrog peb tam sim no!