but sometimes he runs all over our yard » 但有时他跑都在我们的院子里 field water tightness test » 水密性试验 Showcase » 展示 ..
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如果船厂可以做超声波试验，则应该用超声波来确认水密舱盖的密封性。
Ultra sonic test to be carried out for confirm tightness of hatch covers if the yard can do.
论述了高机动雷达平面阵列天线馈电系统的水密性设计及试验方法。
In this paper, the design of planar antenna feed system of high-speed mobile radar and a test method for watertightness are presented.
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