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Uploaded by sn903209 on Mar 11, 2008
擋住紅外線發射,接收的值竟然變大
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可是接收和發射隔著一片板子。接收與發射是平行的
sn903209 3 years ago
你手指本身都會發射紅外線(體溫)
ChiYuenT 11 months ago
係吾係因為你手指將集束既紅外線散射入接收
jamesy02312 3 years ago
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可是接收和發射隔著一片板子。接收與發射是平行的
sn903209 3 years ago