JIS K 7035:1998 塑料管道系统.玻璃纤维增强热固性塑料(GRP)管道.在潮湿条件下蠕变因子的测定和长期特定环硬度的计算
Plastics piping systems -- Glass-reinforced thermosetting plastics (GRP) pipes -- Determination of the creep factor under wet conditions and calculation of the longterm specific ring stiffness