A hard anodic oxidation technique of forge aluminum alloy LD7 for piston was studied. The prescription and parameters of the technique were set up.
对铝合金LD 7硬质阳极氧化工艺进行了研究，提出了适合ld 7铝合金的工艺配方与工艺参数。
By researching cored samples, 9 logging parameters reflecting distinctly lithology are selected by cross plot technique, and build up lithologic sample set.
首先依据岩心取样进行岩性归类，然后通过交会图技术确定了9个对岩性反映较明显的参数，并建立起研究区域的岩性样本集。
It introduced an automatic measuring system of comprehensive parameters of wheel set based on optoelectronic detecting technique.
介绍了一种基于光电检测技术的轮对综合参数自动检测系统。
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