Hydroclamp
液压夹具
🗣️ 情景例句
My father is an engineer of a construction company, and mother is a doctor.
我父亲是一家建筑公司的工程师，母亲是一名医生。
He likes playing the violin.
他喜欢拉小提琴。
The six students put their closed hands in front of them.
6个学生将握紧的手放在前面。