OS GSO ISO 4548-4:2013 內燃機全流式潤滑油濾清器試驗方法 第4部分:初始顆粒截留效率、壽命和累積效率(重量法)
Methods of test for full-flow lubricating oil filters for internal combustion engines -- Part 4: Initial particle retention efficiency, life and cumulative efficiency (gravimetric method)