热塑性塑料压力管材和管件用材料 分级、命名和设计系数
Thermoplastics materials for pipes and fittings for pressure applications—Classification, designation and design coefficient
标准状态
发布于：2026-10-30
实施于：2027-05-01
废止
Thermoplastics materials for pipes and fittings for pressure applications—Classification, designation and design coefficient