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0
2023-10-18 21:38:37
CO(NH2)2=60
(NH4)2SO4=36+SO4=132
2023-10-18 21:32:04
SO=32+16=48
CH4=12+1x4=16
Fe2(SO4)3=400
2022-03-01 21:58:33
2022-02-10 18:31:09