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记下钻头系列号和型号。
The bit serial adder system was chosen over a normal gear system because of the number of gears it takes to make the clock's calculations.
该位串行加法器系统是选择了一个由于齿轮数齿轮系统的正常需要，使时钟的计算。
A 48-bit serial number is factory lasered into each DS1991 to provide a guaranteed unique identity which allows for absolute traceability.
每片DS1991内部都有在工厂 光刻的48位序列码，为唯一的身份验证提供了保证，也确保了可绝对跟踪功能；
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