An electric bell is arranged in the circuit between each voice operated switch and the power supply. 在各个声控开关与电源之间的电路上设有电铃。 ip.com 5. She awoke to the ringing of an electric bell. 她在电铃声中醒来。 www.kekenet.com 6. He awoke to the ringing of an electric bell. ...
The electrical bell has the advantages of simple structure, low cost, small electricity consumption and large sound, and an AC power supply and a DC power supply both can be used in the utility model. The utility model can be widely used as a door bell for stations and schools, can be ...
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Bell公司 helicopter 主旋翼飞行控制调节检查说明书
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Bell 505 机械虫洞指示书说明书
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505-18-14 7 December 2018 MODEL AFFECTED: 505 SUBJECT:FREEWHEEL ASSEMBLY HOUSING SEALANT, APPLICATION OF HELICOPTERS AFFECTED: Serial numbers 65011 through 65074, 65077 through 65081, 65083 through 65122, 65124 through 65128, 65130 through 65132, 65134, 65139 and 65141 [Serial number 65075, ...