Plastics piping systems . glass - reinforced thermosetting plastics components . test methods to prove the design of cemented socket - and - spigot joints 塑料管道系统.玻璃纤维增强式热固性塑料元件.检验胶合管座套筒接头设计的试验方法
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Plastics piping systems . glass - reinforced thermosetting plastics components . test methods to prove the design of rigid locked socket - and - spigot joints with elastomeric seals 塑料管道系统.玻璃纤维增强式热固性塑料元件.检验带有弹性密封件的刚性锁定管座套筒接头设计的试验方法