The rudder blade is semi-balance, double plate, stream-line type. Able to turn to 350 rudder Angle at port and starboard side.

舵叶为半平衡式双板流线型结构，可分别向左右回转350舵角。

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Writes the text representation of the specified double-precision floating-point value, followed by the current line terminator, to the standard output stream.

使用指定的格式资讯，将指定之物件的文字表示(后面接著目前的行结束字元)写入标准输出资料流。

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