This paper analysised factors of system error by gas viscous resistance and photoelectric timer, and suggested to amend it.
分析气体粘滞性阻力和光电计时器所引起的系统误差的因素，以及修正这误差的建议。
This paper analysised factors of system error by gas viscous resistance and photoelectric timer, and suggested to amend it.
分析气体粘滞性阻力和光电计时器所引起的系统误差的因素，以及修正这误差的建议。
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