Following the fuel testing the aircraft is undergoing structural coupling and ground vibration testing, as well as completing hydraulic testing of the doors and landing gear.
此次燃料测试后，飞机将进行结构耦合和地面振动测试，并将完成门和起落架的水压测试。
Research and development of hydraulic coupling used in hollow shaft can effectively resolve problems of the large-scale transmitting mechanism on its own large quality and inertia.
空心轴用液压联轴器的研究开发有效的解决了大型传动机构自身质量惯性大等问题。
Fill oil into the oil tank, when the hydraulic pump is full of oil fluid, manually turn the coupling, till there is no bubble in the oil outlet.
向油箱灌油，当油液充满液压泵后，用手转动联轴节，直至泵的出油口出油并不见气泡时为止。
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