... negative control line；反向控制管路 negative control operation；反向控制操作 negative control orifice；反向控制量孔 ...
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negative flow control operation 反向流操纵作业
Adopt digital computerized control system, needle stitch , stitch length, Automatically positive and negative points, backstitch , stitch pattern setting , one screen operation, easy to operate.
采用电脑数字控制系统，针距、珠点、半针按钮，自动正反点、倒缝、花样线迹设定，一屏操作，轻松方便。
Finally the negative feedback effect of the aileron operation on the control parameters in the stable region is studied.
最后研究了副翼操纵反馈设计对操纵参数稳定域的影响。
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