mains electricity 中文意思是什麼
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Besides serving as carriageways for vehicles and pedestrians, roads also accommodate various utility services, such as water and gas mains, sewers and electricity and telephone cables
除了供車輛和行人使用外，本港的道路也敷設了各種公用設施，如水管、煤氣喉管、污水渠、電纜和電話線等。 -
Two serious accidents occurred in recent months, both involving short - circuiting of live parts on low voltage electrical installations. in each case, the registered electrical workers ( rews ) did switch off the mains and essential supplies at the consumer s switchboard in order to carry out periodic maintenance inspection. however, they did not isolate the electricity supply from the power company
在這兩宗個案中，注冊電業工程人員在進行定期檢查時，並未聯絡電力公司切斷來電電源，而祗是將用戶開關掣板的總掣及后備電源關掉，所以這些電掣的來電方向，仍然是帶電。 -
For projects in the industrial park, it is up to the county government and its functionaries to be responsible for “ 7 availabilities and 1 leveling ” ( available of water, electricity, road, phone, tv, bus, broad band and land leveling ), the mains shall be connected to the enclosing wall of the enterprise
對落戶縣工業園的項目，由縣政府及相關職能部門負責「七通一平」 （水、電、路、電話、電視、公汽、寬帶通，土地平整） ，主管線接至企業圍墻外。 -
The electricity supply has been cut off / disconnected at the mains
電力供應已在電源處截斷 -
The hum of mains electricity is causing this gentleman some discomfort
電流發出的嗡嗡聲讓這位辦公室職員快崩潰了。 -
Signalling on low - voltage electrical installations in the frequency range 3 khz to 148. 5 khz - immunity requirements for mains communications equipment and systems operating in the range of frequencies 3 khz to 95 khz and intended for use by electricity suppliers and distributors
頻率范圍由3khz至148 . 5khz的低壓電氣設備的信號傳輸.在3khz至95khz頻率范圍內操作和由電力操作的主要通訊設備和系統的抗干擾電源和配電器的要求 -
Signalling on low - voltage electrical installations in the frequency range 3 khz to 148, 5 khz - part 2 - 3 : immunity requirements for mains communications equipment and systems operating in the range of frequencies 3 khz to 95 khz and intended for use by electricity suppliers and distributors
頻率范圍由3khz至148 . 5khz的低壓電氣設備的信號傳輸.第2 - 3部分:電源和配電器使用的工作頻率為3khz至95khz的主要通訊設備和系統的抗擾度要求
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