There was nothing to fall back on so valvular surgery without an artificial valve - at least as a backup - was a very dangerous game to play.
所以，没有人造瓣膜的瓣膜手术是一个非常危险的游戏。
Neoprene tube cover, plug-n-play reservoir attachment, bite valve with cover.
氯丁橡胶管套，即插即用存储附件，咬阀盖。
Suggested opening the user can freely adjust the size, the appropriate valve size increases, and thus play a role in reducing the wear and tear.
提议用户在可以开度自在调节的规模内，适当增大阀门的口径，从而起到减小磨损的作用。
Camshafts play an important part in the valve train of engine, their accuracy of finish can affect the unitary performance of engine.
凸轮轴是汽车发动机配气机构的一个非常重要的机械部件，它的加工精度直接影响到汽车发动机的整体性能。
Camshafts play an important part in the valve train of engine, their accuracy of finish can affect the unitary performance of engine.
凸轮轴是汽车发动机配气机构的一个非常重要的机械部件，它的加工精度直接影响到汽车发动机的整体性能。
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