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'2020'
China GB Standards List

 GB/T 39248-2020  
Specification for thermoplastic multi-layer (non-vulcanized) hose and hose assemblies for conveying liquefied petroleum gas and liquefied natural gas "No. 1 Amendment"

输送液化石油气和液化天然气用热塑性塑料多层(非硫化)软管及软管组合件 规范《第1号修改单》

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