Timing a motor cycle : when the machine crosses beams from photo-electric cella at the start and finish of the run, the time is measured. (In fact, the beam is invisible.)

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Creative#:

TOP24033646

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

No

Property Release:

No

Right to Privacy:

No

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