pointer instrument
... 外部稳压电源 external stabilized power 针式仪器 pointer instrument 测量电阻 measuring resistor ...
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触针式仪器 stylus instrument
触针式仪器的部件 stylus instrument components
指针度盘式仪器 pointer-and-scale instrument
指针偏转式仪器 pointer-deflecting instrument
双针式量测仪器 cross-pointer instrument
触针式摄谱仪的器件 stylus instrument components
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赤道式日晷，是古人利用太阳投影测时的科学仪器，由晷盘、晷针和底座组成。
An equatorial sundial is an ancient scientific equipment to tell time by using the shadow from solar projection. It consists of a sundial plate, a gnomon and a base.
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