青云翻译

5-speed minus 4 files: 5 files to consider the speed of 60 km was reduced to 4 file a. Principle ibid.

5 less 4 stalls: 5-speed speed of 60 km to consider reduced to 4. Principle as above.

5 grades reduce 4 grades: 5 grades of speeds reduced in 60 kilometers on the consideration are 4 grades.Principle same.

Document 5: 5 minus 4 stalls stalls at the speed at 60 km to consider reduced to 4. Schematic ibid.

5 less 4 stalls: 5-speed speed of 60 km to consider reduced to 4. Principle as above.