視覺式占線測試 engaged test: 在線測試; 占線測試visual engaged lamp: 占線信號燈engaged test circuit: 占線測試電路extended engaged test: 占線延長測試false engaged test: 不正確的占線測試下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯