米乐app官方-米乐m6苹果官网下载 > 标准下载>bs en 13765-2010 a1-2015 烃类、溶剂和化学品输送用热塑性多层(非硫化)软管和软管组件 规范 thermoplastic multi-layer (non-vulcanized) hoses and hose assemblies for the transfer of hydrocarbons, solvents and chemicals. specification免费下载
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