DIN EN 60721-2-9:2015
環境條件的分類. 第2-9部分: 大自然呈現的環境條件. 測得的沖擊和振動數據. 儲存, 運輸和使用中 (IEC 60721-2-9-2014); 德文版本EN 60721-2-9-2014
Classification of environmental conditions - Part 2-9: Environmental conditions appearing in nature - Measured shock and vibration data - Storage, transportation and in-use (IEC 60721-2-9:2014); German version EN 60721-2-9:2014