GB/T5651-1985扩口式管接头密合垫
Flared type tube fittings & Seat insert
检查油箱底部放油口是否已关闭,确定关闭后再打开油箱顶部加油口密封盖。
Need to check the oil box 's bottom which outlet whether closed or not , after closed surely then open the top of oil box and add the sealing cover for the top orifice .