농도가 다른 두 소금물을 섞는 경우 (updated 2024-10-19)
Duration: 3:09
655 weergaven | 24 jun. 2020
655 weergaven | 24 jun. 2020
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386 weergaven | 2 dec. 2020
386 weergaven | 2 dec. 2020
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159 weergaven | 31 dec. 2020
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999 weergaven | 30 dec. 2021
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122 weergaven | 11 nov. 2020
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Duration: 24:05
225 weergaven | 11 jan. 2021
225 weergaven | 11 jan. 2021