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ѤҪԡ
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ʶԵ

: 5030853
й 10 ؤŷ ͹Ź
s
ͧ
single lens microscope ͧŷȹ쪹ԴŹ 1229
single slit 872
Singularity 2277
sky wave 936
slide projector 912
slip ring 1416
slit 783
slope 816
smoke cell 619
Sn պء 1248
Snell law 2350
soap ʺ 1252
soda ash ⫴ͪ 2654
sodium hydroxide δ͡䫴 1794
sodium 956
soft iron 869
soil Թ 927
solar air system collector 867
solar cell 557
Solar cell 667
 
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