His inventions and innovations included batteries, cement mixer, the sound recording telephone, double- and multi-type cablesystem, 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。
2
Good knowledge of the cablesystem process.
良好的线束制造工艺知识。
3
Cablesystem is to receive part of the assembly language and useful download.