Two and Three channel Codewheels for use with Agilent optical Encoder Modules( 与Agilent编码器模块应用的三通道编码 Two and Three channel Codewheels for use with Agilent optical Encoder Modules( Agilent编码器模块应用的三通道编码 两个和三个频道与安捷伦光学编码器模块使用Codewheels(与安捷伦编码器模块应用的两/三通道编码盘)