5、标准试验条件（STANDARD TEST CONDITION）:试验环境环境温度23±2℃，相对湿度65±5%，如有疑问时，依温度10-40℃，相对湿度30-85%测定。
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在标准耐火试验条件下 fire stability ; fire integrity ; duration of fire resistance
用数理统计方法改进了邻菲啰啉分光光度法测定铁的条件试验和标准曲线，有效地提高了分析结果的准确性。
The conditional test to measure iron by means of O-phenanthroline spectrophotometry and the standard curve are improved with mathematical statistics.
采用白噪声信号作为标准声源的输入信号，在常温无气流条件下对消声器实物模型进行了静态放声试验。
After a white noise signal has been taken as the input of a standard sound source, a static acoustic test is conducted for a prototype silencer without air flow and at the normal temperature.
采用标准加入原子吸收分光光度法测定铅锡合金锭液中铅的浓度，试验确定了最佳的测定条件。
The lead concentration in Pb-Sn alloy plating bath was determined by standard additional atomic ab-sorption spectrometry, and the optimal determination conditions were obtained.
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