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cong lang » cong vang, cong luong, cong quang
hoc cong » hoc co, cac cong, hoc dung
lua hoc » luan hoc, luc hoc, cua hoc
vi lua » vi luu
cong lang » cong vang, cong luong, cong quang
hoc cong » hoc co, cac cong, hoc dung
lua hoc » luan hoc, luc hoc, cua hoc
vi lua » vi luu
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