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Cov kua dej sib cais
Biogas, cov cuab yeej siv nkag phwj. Rau kev sib cais thiab ua kua sib cais, pov tseg kom zoo dua, yog ib qho kev sib txuas tseem ceeb hauv cov txheej txheem kev kho.
Biogas, cov cuab yeej siv nkag phwj. Rau kev sib cais thiab ua kua sib cais, pov tseg kom zoo dua, yog ib qho kev sib txuas tseem ceeb hauv cov txheej txheem kev kho.