标 准 编 号：DIN 28124-1-1992 简体中文标题：非合金钢和不锈钢制非压力容器和工艺装置用人孔盖 繁体中文标题：非合金钢和不锈钢制非压力容器和工艺装置用人孔盖 English Name：Manhole closures for unpressurized vessels and process apparatus of nonalloy and stainless steel...