以普通光镜及偏光显微镜观察骨结构及胶原纤维变化。
The changes of bone structures and collagen fibers were observed with light microscope and polariscope.
沿着裂缝的边缘粘接由普通光弹性材料制成的窄条，即可模拟钢筋。
The steel reinforcement can be simulated in cementing a strip of ordinary photoelastic material along the crack edge.
用新型螺旋槽管代替普通光管对换热器进行技术改造，既简便易行，节能效果又显著。
The replacement of common smooth tubes by new spiral groove tubes during technical reconstruction of heat exchanger is both simple and remarkable energy-saving effectiveness.
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