标 准 编 号：DIN 86089-2008 简体中文标题：与铜镍合金管路对接焊的配件.同心异径管 繁体中文标题：与铜镍合金管路对接焊的配件.同心异径管 English Name：Fittings for butt welding into copper-nickel-alloy pipelines - Concentric reducers ...