...电预热； 热风预热； 热水预热 [gap=680]directly buried insulating pipe; preheating installation without com- pensation; electric preheating; hot wind preheating; hot water preheating ..
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实例分析保温管道无补偿电预热施工技术_建筑施工论文 关键词：热力管道；无补偿直埋；电预热 [gap=343]Key words: heat pipe; No compensation buried; Electricity preheating
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研究了粉体预热温度、频率、环境温度等工艺参数及条件对PZT陶瓷电性能的影响。
The effects on electric properties of PZT ceramic were investigated, including preheating temperature, frequency, environment temperature and polarization.
试验结果表明，模压前合理的预热可以显著地提高酚醛塑料的电性能及力学性能；
The effect of preheating, test-piece thickness and coupling agents on the electric properties and the mechanical properties of the materials have been specially studied.
本实用新型的技术方案：该设备由三个部分组成，恒温油预热锅、真空电炸锅、真空抽气机。
The technological scheme of the utility model: the device consists of three parts: a preheating pan of constant temperature oil, a vacuum electric frying pan and a vacuum air extractor.
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