QQ90, QF60, QQ60, QQ60A PTO PTO is a special kind of development method and the company for cement tankers and other vehicles, it is installed between the engine and gearbox, which belongs to the front PTO, commonly known as "sandwich pto". Engine speed, rotation direction, structural forms are as follows: 1. The QF60 ratio is 1, the same three axis, two-way 2, QQ60 speed ratio is 0.63 in four axis, two-way 3, QQ60A ratio was 0.64, 4, three the same shaft bidirectional QQ90 speed ratio is 1, the same three axis bidirectional