求翻译：叶片轴颈与轮毂体的密封采用由弹簧和油压双重压力的V型密封，磨损后也能自动密合，更换时不需拆下叶片，非常方便。是什么意思？

Leaf journal and the hub body seal v seal adopted by the springs and hydraulic double pressure, wear and tear can also automatically seal replacement without removing the blade, very convenient.

Leaf journal to the hub with the seal and the oil pressure by spring pressure of the seal, V wear can also automatically close when they replace, is not necessary to remove leaves and is very convenient.

The leaf blade journal and the wheel hub body seal uses by the spring and the flowing tubing head pressure dual pressure V seal, after wears also can be closed automatically, when replacement does not have to dismantle the leaf blade, extremely convenient.

Blade axle and wheels by springs and hydraulic double pressure body seals v-seal wear and also automatically after a tight fit, the replacement is not required to remove the blade, very convenient.

正在翻译，请等待...