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计时码表

计时马表，或称马表（英语：chronograph），是一种有计时功能的手表，是将秒表的功能结合于手表之中。计时码表于1720年由英国人乔治·格林汉（英语：George Graham）发明。

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无论是机械手表，石英手表，甚至LCD显示数位表，都有计时码表的产品。LCD数位手表的价钱是三者中最低，但计时功能却是最为精确，精度可达百分之一秒或千分之一秒。石英的计时码表价钱较贵，精度多数为十分之一秒 。而机械计时码表的精度是最差，只能以秒计算，但由于机芯结构复杂，因此价钱最为昂贵。

 
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计时码表
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