| 单词 | screw jack |
| 例句 | They include a screw jack manufacturer in Ohio and a home health care business in Michigan. Graham Not Slowing Down After Sale of The Post 2014-08-04T04:00:00Z The forward end of each section was supported by a screw jack placed under a rib 2 ft. from the front end. Concrete Construction Methods and Costs The shells of the molds were of ¼-in. steel plate; the jack was an ordinary screw jack. Concrete Construction Methods and Costs Between these guide posts set plunger posts which were raised and lowered by screw jacks. Concrete Construction Methods and Costs |
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