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In this study, the effect of ultrasonic treatment time on crystallization structure of industry pure aluminum ingots was investigated.
研究了超声波处理时间对工业纯铝铸锭结晶组织的影响，即添加除气剂又进行超声波处理的情况。
In this study, the effect of ultrasonic treatment time on crystallization structure of industry pure aluminum ingots was investigated. e. g. : with degasser and ultrasonic.
前言：研究了超声波处理时间对工业纯铝铸锭结晶组织的影响，即添加除气剂又进行超声波处理的情况。
The spinnability and drawability of PMMA/PET blends were studied. The orientation and crystallization structure were measured by sonic velocity method and X-ray diffraction respectively.
研究了PMMA/PET共混纤维的可纺性和拉伸性，并测定了拉伸丝的力学性能、取向和结晶结构。
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