Athletic training timer
作者： Mel N. Person
DOI:
关键词: Buzzer 、 Foot Switch 、 Engineering 、 Signal 、 Computer hardware 、 Duration (music) 、 Timer 、 Athletic training
摘要: An athletic training timer (10) including a selectable time-delay (11), signal duration (12), buzzer (14), power supply (16) for powering the circuit and remote foot switch (15) which is adapted to be activated by an athlete initiating play.
lens.org 参考文章(6)
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