机械计时器的进展促使大部分人寻求更精确的日晷，以便校准机械计时器。
The development of mechanical timepieces spurred the search for abundance accurate sundials with which to regulate them.
内置计时器及机械循环计数器。
用废弃的输液器制作了简易的“打点计时器”，可以在课堂上分析、判断直线运动以及研究机械振动。
A simple ticker-timer, which can be used to study the straight line motion and the mechanical vibration, is made using transfusion set.
当心别弄坏了计时器的机械装置。
公元前117年，东汉的张衡制造了大型天文计时仪器——水运浑天仪，初步具备了机械性计时器的作用。
In117bc zhang heng of the east han dynasty manufactured the water-driven celestial globe a large astronomical time-measuring apparatus that had the primitive function of a mechanical time measurer.
公元前117年，东汉的张衡制造了大型天文计时仪器——水运浑天仪，初步具备了机械性计时器的作用。
In117bc zhang heng of the east han dynasty manufactured the water-driven celestial globe a large astronomical time-measuring apparatus that had the primitive function of a mechanical time measurer.
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