GB/T 40937-2021塑料管道系统塑料复合管材和管件长期强度的测定方法标准
英文:Plastic piping systems—Determination of long-term strength for plastic composite pipes and fittings GB/T 40937-2021介绍...
英文:Plastic piping systems—Determination of long-term strength for plastic composite pipes and fittings GB/T 40937-2021介绍...