... 根算符 软件nroot operator 根系基 root system basis 跟踪标志 tracking mark ...
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根管基础系统 Endo Basic System
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犬冠自然是首选的基牙的义齿由于其根系形态和骨的支持。
Natural canine crowns are preferred as abutments for removable partial dentures because of their root morphology and bony support.
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