Aemission spectrometer, micro-hardometer, optical microscope and scanning electron microscope were used to analyze the reason of crack on connecting rod unit assembly for piston of car engine.
采用直读光谱仪、显微硬度机、光学显微镜和扫描电子显微镜等分析手段，对失效的汽车发动机活塞连杆总成断裂原因进行了分析。
Also, computer simulation is conducted to work out the contrast curve of scanning spots and the offset voltage across the modulation unit of the optical phased array.
最后通过计算机模拟计算，得出扫描点的对比度曲线以及相控阵调制单元上所加的补偿电压。
The optical scanning apparatus includes a light source unit to simultaneously emit a plurality of light beams;
所述 光学扫描设备包括：光源单元，同时发射多个光束；
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