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| HG 21505-1992 Combined Sight Glass (English Version) |
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Detail of HG 21505-1992
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Introduction of HG 21505-1992
本标准规定了组合式视镜系列、设计参数、安装尺寸和技术条件。本标准适用于化学、石油、医药、轻工、机械等部门，直接用螺栓安装在接管或管件法兰接口上的组合式视镜。
Contents of HG 21505-1992