平衡吊，也稱助力機械手、手動移載機，是一種新穎的、用yong於yu物wu料liao搬ban運yun及ji安an裝zhuang時shi省sheng力li操cao作zuo的de助zhu力li設she備bei。它ta巧qiao妙miao地di應ying用yong力li的de平ping衡heng原yuan理li
，使shi操cao作zuo者zhe對dui重zhong物wu進jin行xing相xiang應ying的de推tui拉la，就jiu可ke在zai空kong間jian內nei平ping衡heng移yi動dong定ding位wei。重zhong物wu在zai提ti升sheng或huo下xia降jiang時shi形xing成cheng浮fu動dong狀zhuang態tai。無wu需xu熟shu練lian的de點dian動dong操cao作zuo
，操cao作zuo者zhe用yong手shou推tui拉la重zhong物wu

，就jiu可ke以yi把ba重zhong物wu正zheng確que地di放fang到dao空kong間jian中zhong的de任ren何he位wei置zhi。