His inventions and innovations included batteries, cement mixer, the sound recording telephone, double- and multi-type cable system, railways used brakes.
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。
Another reason is industry standards, where an external organization set cable and connector type specifications so sound systems can connect.
另一个原因是工业标准,外部组织设置电缆和插头的型号标准以便音响系统能够连接上。
Fengfeng higher level of urbanization, water supply, electricity, gas, heating, communications and cable television infrastructure such as sound, the realization of a centralized supply network.
峰峰城市化水平较高,供水、供电、供气、供暖、通信及有线电视等基础设施健全,实现了网络化集中供应。
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