介绍了电动变桨距系统的结构，阐述了变桨距系统在运行中因变桨轴承故障而存在的问题。
Introduced electric pitch from the structure of system and elaborated electric pitch from system in the movement because of electric pitch system bearings failure but existent problem.
介绍了电动变桨距系统的结构，阐述了变桨距系统在运行中因变桨轴承故障而存在的问题。
Introduced electric pitch from the structure of system and elaborated electric pitch from system in the movement because of electric pitch system bearings failure but existent problem.
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