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- There are many difficulties during the new rotating blowout preventer's manufacture and test, they concentrate on spherical seal, dynamic seal and bearings. 研制旋转防喷器有几大难点,主要集中在密封胶芯、旋转动密封及轴承,各自的寿命满足实际应用是保证钻井施工安全的关键。
- Experimental Studies on Seal Performance of Spherical Sealing Joint 球面密封结构密封性能初步测试
- 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。
- Our foil packets seal the flavour in. 我们用锡纸包装以保持原味。
- Keywords rotating blowout preventer;underbalance drilling;spherical seal;dynamic seal; 旋转防喷器;欠平衡钻井;密封胶芯;动密封;
- This document carries the royal seal. 这份文件上盖有王室印章。
- The seal on the bottle has perished. 瓶子的封记已经腐烂。
- He impressed his seal on the wax. 他在火漆上盖了他的私章。
- 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。
- A round seal affixed to a papal bull. 印玺一个圆形的教皇的正式宣布训令或法令的封印
- The oil-lamp needs a new globe, spherical lampshade. 这油灯需配个新的圆灯罩。
- She forgot to seal her letter before mailing it. 她忘记在寄信前将信封上。
- The experience set the seal on their friendship. 这一经历确定了他们的友谊。
- He affixed his seal to the document. 他在文件上盖了印。
- Their handshake was a seal of friendship. 他们的握手是友谊的象徵。
- Do you know how much a seal coat is? 你知道海豹皮大衣多少钱一件?
- The envelope's seal was torn open. 信封封缄被撕开了。
- The letter bears the seal of the king. 这封信有国王的封印。
