FIFAワールドカップのインスタグラム(fifaworldcup) - 12月6日 20時58分

A referee checks the Hawk-Eye goal-line technology (GLT) for the FIFA Club World Cup Japan 2015. The camera-based system is millimetre-accurate and indicates whether or not a goal has been scored within one second by a vibration and visual signal on each match official’s watch.
#ClubWC #Japan #GLT #camera #goal #nogoal

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