Report copyright - Ch ¬ng I - tonthatchat.weebly.com · N¨m 1986 c¶ níc cã kho¶ng 28 tr¹i t«m gièng. S¶n xuÊt ®îc 20 triÖu postlarvae/ n¨m. §Õn n¨m1989 cã kho¶ng 49 tr¹i s¶n xuÊt
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