The principle of a composite test device for airtightness of automobile compartments and air volume of air conditioners was described.
论述了客车车室气密性和车用空调风量综合试验装置的原理。
Plastics piping systems. Thermoplastics piping systems for soil and waste discharge. Test method for airtightness of joints.
塑料管道系统。土壤和废料排出用热塑管道系统。粘接处密封度试验方法。
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