The cone is probably the first and best idea in sound delivery.
圆锥体大概是最先用来传递声音的工具，也是最好用的工具了。
In view of condensate delivery pump extremely high cavitation performance request. wo proposed one kind of new hinge type cone-way valve and expounded the principle of its work.
针对冷凝液输送泵极高汽蚀性能的要求，提出了一种新型铰接式单向阀，阐述了其工作原理。
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