阀门的缺点：尽管对这一代阀门的改进排除了由于粗暴关闭造成的损害问题中比较严重的问题，但它们还不能完全防止机械损伤。
Valve Disadvantages: Although the improvements to this generation of valves eliminate the more serious problems of damage from abusive closing, they are not totally immune to abuse.
尽管这一设计有缺点，但仍被认为是最佳设计之一。
With all its disadvantages, this design is considered to be one of the best.
应用推荐