美利体育登录入口官网:JIS K 7031:2003 塑料管道系统.玻璃纤维增强热固性塑料(GRP)管道和配件.在短期内压下管壁密封性检定的试验方法
Plastics piping systems -- Glass-reinforced thermosetting plastics (GRP) pipes and fittings -- Test methods to prove the leaktightness of the wall under short-term internal pressure