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ѤҪԡ
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ʶԵ

: 4374904
й 21 ؤŷ ͹Ź
s
ͧ
single lens microscope ͧŷȹ쪹ԴŹ 1147
single slit 784
Singularity 2022
sky wave 789
slide projector 815
slip ring 1324
slit 704
slope 706
smoke cell 528
Sn պء 1170
Snell law 2133
soap ʺ 1167
soda ash ⫴ͪ 2558
sodium hydroxide δ͡䫴 1697
sodium 862
soft iron 790
soil Թ 817
solar air system collector 728
solar cell 476
Solar cell 489
 
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