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- Research on Approximation Development Method Influence on Strength of Oval Seal Head 近似展开方法对椭圆形封头强度影响的研究
- oval seal head 椭圆形封头
- Press a Thick Wall Hemispherical Seal Head 一种厚壁半球形封头的压制
- XM-230/80 rotary seal head is a rotary seal unit on wellhead, specialized for negative pressure and low pressure drilling, characterized by reliable sealing effect, ease of opration and safe service. XM-230/80型钻井旋转密封头是一种专用于负压、低压钻井的井口旋转密封装置,具有密封可靠、操作简单和防爆、安全等优点。
- It takes only two to four irradiations to inspect a sealing head weld by using the technology. 使用这种方法，一般只需两到四次透照就能完成封头焊缝的探伤。
- She nestled her head on his shoulder. 她将头依偎在他的肩上。
- Cook the meat quickly at first to seal in the juices. 一开始要大火烧肉，以便保存肉汁。
- The putty gives a good seal round the window. 窗户四周泥的油灰密封效果很好。
- The playing field is a large oval. 球场很大，呈椭圆形。
- Our foil packets seal the flavour in. 我们用锡纸包装以保持原味。
- SLOTTED OVAL HEAD WOOD SCREWS B.S. 英制开槽半沉头木螺钉。
- This document carries the royal seal. 这份文件上盖有王室印章。
- Comets move around the sun like planets, but in long oval course. 彗星象行星一样绕太阳运转，然而其轨道呈狭长的椭圆形。
- The seal on the bottle has perished. 瓶子的封记已经腐烂。
- The deer lowered its head to drink from the pond. 鹿低下头去喝池塘里的水。
- He gave the little boy a clout on the head. 他在那小男孩的头部打了一下。
- He impressed his seal on the wax. 他在火漆上盖了他的私章。
- I saw the small girl topple over and hit her head. 我看见那小女孩栽了一跤，碰着了头。
- The deal needs the government's seal of approval. 这一交易需经政府批准。
- Seal (up) the window to prevent draughts. 把窗户封起来以防风。
