Jobs that plummeted to the bottom of the happiness chart along with the roofers included garage and service station attendants and molding and casting machine operators.
同屋顶工一样是在快乐程度名单上垫底的职业包括：垃圾和服务站工作人员，制模和铸造机器操作员。
Hydraulic system in the bed to the lateral casting tank, the station platform for the relocation of station and button electronic hand wheel with the hoisting of heavy cancel button stations.
液压系统在床身外侧铸造接油槽，站台上设按钮站与外移式电子手轮配合，取消笨重悬挂按钮站。
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