Lub qhov rooj hluav taws yog ib feem tseem ceeb ntawm cov khoom siv tua hluav taws thiab kev tiv thaiv hluav taws hauv zej zog. Lub qhov rooj hluav taws xob steel muaj lub sijhawm ntev ntev los tiv thaiv kev sib kis ntawm hluav taws, txiav tawm qhov hluav taws kub thiab siv zog rau lub sijhawm tua hluav taws.

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