前方牵引疗法对恒牙早期骨型Ⅲ类错(牙合)硬组织作用的研究
전방견인요법대항아조기골형Ⅲ류착(아합)경조직작용적연구
The effect on hard tissue of skeletal Ⅲ classmalocclusion with malxillary protraction
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