Measurement of liquid viscosity based on the multiple 　　laser photoelectric door
GUO Xiao-chun¹, WU Jia-qi², CAO Ping-ping¹, LI Song-yang³, XING Xue-yi²
College Physics . 2021, (8): 40 .  DOI: 10.16854 / j.cnki.1000-0712.210061

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