... 双同步通信 binary synchronous communication 双系统录音 double system recording 双线馈线 twin feeder ...
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double system sound recording 声像同步录制系统
Double Entry Recording System 借贷记账法
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Old age, his inventions and innovations including batteries, cement mixer, sound recording telephone, double - and multi-type cable system, railways used brakes.
晚年，他的发明和革新包括蓄电池、水泥搅拌机、录音电话、双工式和多工式电报系统、铁路用制动器等。
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