美利体育登录入口官网:DIN EN 751-2:1997-08 与第一、第二和第三族气体和热水接触的金属螺纹接头的密封材料 - 第 2 部分:非硬化接合剂
Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds; German version EN 751-2:1996