The principle, structure, measurement limit and analyze of uncertainty of the constant pressure gas flowmeter, which was the key component of gas flow standard apparatus, were considered emphatically.

着重考虑了作为气体微流量标准装置核心的恒压式气体微流量计的原理、结构、下限因素和不确定度等基本问题。

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In the below room temperature test, opening the refrigeration apparatus also switch, automatic temperature and the set temperature range constant.

在进行低于室温的试验时，打开制冷开关，仪器也同样进行自动控温并在设置的温度点范围内恒定。

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In the test, after anisotropic consolidation, keeping the deviator stress, pore water is injected using pore water control apparatus under a constant volumetric strain controlled condition.

该实验是在各项异性的固结作用后保持差应力，使用孔隙水控制装置在体积不变的应变控制条件下将孔隙水注入。

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