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。
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。
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