TY - College Physics A1 - SHAO Yun T1 - Systematic error analysis of period of simple pendulum Y1 - 2022-01-20 JF - College Physics JO - College Physics SP - 32 EP - VL - 41 IS - 1 UR - https://dxwl.bnu.edu.cn N1 - 10.16854 / j.cnki.1000-0712.210247 ER -