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Thaychua a! minh hom nay moi co dk de doc bai viet cua cau, nhung hinh nhu minh thay cau hieu ve dc servo nhu vay la co van de roi day, minh cung chua co mot dinh nghia that hoan chinh ve no nhung minh nghi phan hoi hay khong dau co quyet dinh do la dc servo, phan hoi do la co the gan them ngoai ma, mat khac minh biet mot so loai dc servo nhung dau co thay nhu nhung dieu ban thay, rat mong co them duoc su hieu biet them cua ban de cung trao doi.
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