电子计时式转速表 electronic chronometric tachometer

电子计时 electronic timing ; electric time-keeping [timing]

电子裁判计时设备 electronic judging and timing equipment

电子精确计时器 electron chronometer

电子计时装置 electronic timing set

电子式计时器 electronic timer

电子测时计 [电子] electronic time meter ; chronometer ; electronic

可编程序的电子计时器 programmable electronic timer