短语词组短語Output Plug Polarity 輸出極性Output Signal Polarity 眡頻輸出極性Programmable Output Polarity 輸出極性可編程pulsed variable polarity output 脈沖變極性輸出Polarity of output plug 輸出極性Polarity of output voltage 輸出電壓極性 返回 output polarity