The metallographic cooling rate was measured for the Deng Ujimqin mesosiderite using And profile ac concentration vs.

采用剖面中间浓度与镍纹石带宽度定了东乌珠穆沁中铁陨石的金相冷却速率，其冷却速率介于0。

Fracture motorbicycle piston was analysed by means of chemical composition analysis, hardness testing, metallographic examination, and the macro and micro-fractography analysis.

要采用化学成分分、硬度定、金相检验以及断口宏、微观分法，对断裂的摩托车活塞进行了分。

A preparation method to reveal the grain boundrie of zirconium and zircaloy for metallographic and scanning electronic microscope analysis is introduced.

介绍了一种能清楚显示锆及锆合金晶粒的金相及扫描电镜分试样的制备技术。