Ultra sonic test to be carried out for confirm tightness of hatch covers if the yard can do.
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。
The Chevrolet Sonic — and another crucial test of GM's capacity to make popular little vehicles.
推出雪佛兰sonic——对通用汽车生产热销小型车的能力来说，这将是另一个重大考验。
Soil: investigation and testing - Auscultation of foundation elements - Part 1: sonic core test.
土壤：调查和试验。基本元素听诊法。第1部分：声芯试验。
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