sludge [i sl6d[ ]    (¼øÀ§: 17159 - ´ëÁ¹ ¼öÁØ)  
¶æ ¸í) ÁøÈë, Áøâ, ¹ÝÂë ³ìÀº ´«
Mean Semisolid material such as the type precipitated by sewage treatment.
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