食品和化学工业用不锈钢配件.第2部分:无菌法兰管连接件,短类型 Stainless steel fittings for the food and chemical industry - Part 2: Hygienic flanged pipe connection, short type 被代替 预览DIN 11853-2:2011前三页 标准号 DIN 11853-2:2011