The test results indicated that the variation of the spacing between propeller and rudder bulb has obvious effect on propeller open water efficiency.
试验结果表明，桨、舵球间距的变化对螺旋桨敞水效率的影响是明显的。
Electrohydraulic control unit whose performance has direct effect on rudder's characteristics is the key component of ship rudder position control system.
电液控制单元是船用舵机电液位置伺服系统关键部件，其性能的优劣直接影响舵机的性能。
The effect is small and can be corrected by the rudder.
的影响很小，可以通过方向舵纠正。
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