电缆和光缆绝缘和护套材料通用试验方法 第51部分：填充膏专用试验方法—滴点—油分离—低温脆性—总酸值—腐蚀性—23℃时的介电常数—23℃和100℃时的直流电阻率

Common test methods for insulating and sheathing materials of electric and optical cables - Part 51:Methods specific to filling compounds - Drop point - Separation of oil - Lower temperature brittleness - Total acid number - Absence of corrosive component