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。
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。
Plastics piping systems. Thermoplastics piping systems for soil and waste discharge. Test method for airtightness of joints.
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