Testing of metal surface of mould and coated optics with high reflectivity.

金属表面(模具)或镀反射膜光学件的检测。

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Nondestructive testing of metal hardened depth is an important and difficult job, which belongs to material property testing.

金属表面硬化层深度的检测是一项非常重要而又困难的工作。

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Acoustic emission technique is more and more widely applied into material research, dynamic testing of metal structure and equipment integrity, and monitoring in manufacturing procedure.

由此阐述了声发射技术在材料科学的研究，金属构件与设备完整性动态检测，以及制造过程监控中越来越广泛的应用。

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Six of these airports are testing the machines as a primary security check option, instead of metal detectors followed by a pat-down, she said.

CNN: Airport security bares all, or does it?