Introduced an advanced, practical calibrating gas mixture preparation equipment, and gave a minute description of its characteristic.
介绍了一种先进、实用的标准混合气配制装置，并对该装置的特点进行了详细描述。
Gas, liquid or electricity supply or production meters, including calibrating meters thereof.
生产或供应气体、液体及电力用的计量仪表，包括它们的校准仪表。
In calibrating the leak, the pressure in the ballast chamber can be precisely controlled in such a way that the standard gas flow through the orifice is close or equal to the leak rate.
在漏孔校准过程中，通过调节稳压室中的压力，很容易使标准气体流量与漏孔漏率非常接近或相等，从而避免四极质谱计的非线性影响。
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