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- It advances that the non-lapping envelope region is a major fact of generating roundness errors and inquires into the effects of ball roundness with non-lapping envelope region, preliminary pressure error and lap tool wear. 根据四研具体对球面研磨的包络原理，提出了未包络研磨区是产生残存圆度误差的主要因素，并探讨了未包络研磨区、四研具初始压力误差、研具磨损不均匀性产生的原因和对研磨残存圆度误差的影响及解决措施。
- The beer comes out of the barrel under pressure. 啤酒受到压力从桶中流出。
- A preliminary draft or record of a transaction. 条约草案合约的预备性的草案或纪录
- Our pressure vessel is licensed product. 我厂生产的压力容器是授权生产产品。
- Loss of pressure had not registered on the dials. 刻度盘未记录压力下降。
- Air pressure forces the water through the pipe. 空气压力使水通过管道。
- An introductory occurrence or fact; a preliminary. 开端预兆性事件或事实; 开端
- What's the atmospheric pressure today? 今天的气压怎么样？
- The attacks jumped of without the usual preliminary bombardment. 没有通常的预先轰击，进攻就开始了。
- The water pressure may need adjusting. 水压可能需要调整。
- Pressure is force per unit area. 压力就是电单位面积上的力。
- A preliminary examination of an accused person. 预审对被指控的人的初步审查
- He drop out because of the pressure. 由于校规很严，所以他退学了。
- It took a bit of pressure to make the lid close. 要稍按一下才能把盖子盖紧。
- It was done under the pressure of the necessity. 这件事是在迫切需要的情况下而做的。
- At high pressure dry ice will melt. 高压下干冰会溶化。
- Our team got beaten in the preliminary rounds of the competition. 我们队在这次比赛的预赛中遭淘汰。
- The gas is stored under pressure in the tank. 该气体在压缩状态下贮存于罐中。
- The metal frame tends to twist under pressure. 这种金属框受压後容易变形。
- His health collapsed under the pressure of work. 他的身体被工作压垮了。
