同时间距控制装置会根据风速旋转安装在轴承上的风叶，保持在最佳角度。
A pitch controller rotates each blade around a bearing, setting it to the best angle for the wind speed.
旋转控制头是负压钻井的一个关键装置，利用它和其它地面设备可实现边喷边钻。
Rotary control head is a key device in underbalanced drilling. Combined with other units, drilling while blowing out can be achieved.
采用高精度双通道旋转变压器作为发射架的位置检测装置，实现了闭环控制系统中位置信息的反馈。
High accurate double channels rotary transformer is the position detecter of the launcher, feeding back the position information of the closed-loop control system.
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