This is ideal optical instrument for micro observation in metallographic structure and surface morphology. It is suitable for research in metallography, mineralogy, precision engineering, etc.

适用于金相组织及表面形态的显微观察，是金属学、矿物学、精密工程学研究的理想仪器。

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In this paper, by analysis numerous observation data and earthquake cases, we studied the micro-behavior characters of escaping and dissolved Radon and their changing patterns.

本文从大量的实际观测资料及多次震例资料出发，深入地研究了逸出氡和溶解氡的微动态特征及其变化规律。

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The visual inspection was carried through the crack, then the macro and micro observation of the crack, and the microstructure and the hardness of the shell were studied.

对钛合金壳体裂纹进行了外观检查，对其裂纹断口进行了宏、微观观察，并对其组织和硬度进行了检查。

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