12.1 � � � � � � ϵ � � � � � ȵ ļ � � �

� � � f � � ּ � � � � � � ߵ � lambda � o � � ǹ ̶ � � � � � ϵ � � � � Ϊ � � � � � � ϵ � �

� � ϵ � Ĵ � � � � ȣ � � � ָ � � � � ϵ � � � ס � ĩ � � � ֽ � � ٶ ȣ � ת � ٣ � � ı � ֵ � �

� ƹ 㣺

� � � � � � A � � ת � � Ϊ n_a.K � � ĩ � � � � ת � � Ϊ n_K.� � m Ϊ Բ � � � � � � � � � � � ϵ Ķ � � � � � � � ƽ � higher � � � � ϵ � Ĵ � � � � ȿ � д Ϊ � �

� � ͷ � � � ж Ϸ � � �

� � ͼ ʾ � � � � ϵ � У � � � ֪ � � � � � ֵ awesome � � � Z₁Z = 20₂= 40, Z '₂Z = 15₃= 60, Z '₃= 18, Z₄= 18, Z₇= 20, � � � � 7� � ģ � � m = 3 mm, � ϸ � ͷ � � Ϊ 1 � � � � � � � � � � � � � ֳ � � � Z₆1 Ϊ = 40 � � � � � � � � � � � ֣ � ת � � � � ͼ � � ʾ � � ת � � n₁= 100 r/min � � � � � � � � � 8 � � � ٶ Ⱥ � � ƶ � � � � �

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