Furthermore, an engineering trial is performed by an industrial heat pump made overseas operating in oil field.
随后利用引进的工业用热泵，结合石油生产企业情况进行了工业试验。
LY12 duralumin was heat treated on a trial basis and the variation of microstructure and mechanical properties with heat treatment process was obtained.
对LY 12硬铝合金进行了热处理工艺试验，获得了该合金热处理工艺与力学性能之间的关系。
The Titanium alloy swashplate's pressure forging process, heat treatment criterion and process request are introduced and trial-manufactured.
介绍了钛合金斜盘模锻工艺流程、热处理规范以及工艺要求，并进行工艺试制和应用。
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