Two empirical formulae for calculating the temperature at different hours during a clear night and for the time duration under a specific low temperature have been derived and checked.
本文还提出计算晴天夜间各时温度和低于给定界限温度持续时数的两个经验公式。
With both high pressure and low pressure protection and compressor, self-checking compressor on and off controlling program, ensuring low noise, long duration and little temperature fluctuation.
采用由高低压力保护的压缩机组，具有自我监测的压缩机起闭控制程序，噪声小，寿命长，温度波动小。
The high temperature foamed ceramic produced has low firing temperature, short duration of firing, wide range of firing temperature and easily control production.
研制的高温发泡陶瓷具有烧成温度低、烧成时间短、烧成温度范围宽、易于生产控制的特点。
The affecting factors of low value by activation energy determination include heating duration in low temperature stage, pureness of K feldspar and mixture of some plagioclase, quartz et al.
导致活化能取值偏低的影响因素包括低温阶段的加热时间、K-长石的纯度和部分斜长石、石英的混入等。
High temperature went against the accumulation of anthocyanidin and relatively low temperature extended accumulation duration.
过高的气温不利于颖果着色，适度的低温能延长颖果的着色时间。
Low hydrogen type electrode is baked out before welding, the baking temperature and duration as specified by the manufacturer.
低氢焊条在焊前应烘干，烘干温度和时间遵照厂家说明。
The results indicated that the asphalt quality and its average molecular weights were increased after ageing of short duration at low temperature.
测试结果表明，低温短期老化时沥青的质量增加，平均分子量增加。
The results indicated that the asphalt quality and its average molecular weights were increased after ageing of short duration at low temperature.
测试结果表明，低温短期老化时沥青的质量增加，平均分子量增加。
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