protraction exposure
低量长时间照射
Further protraction of the discussion will not achieve anything.
继续讨论下去并不能解决任何问题。
Contradictions and Countermeasures in the Protraction of Land Contract Period
论延长土地承包期的矛盾与对策
In addition, the most practical representation and protraction methods will be studied.
同时，探索出最适合箱包设计的表现与绘制方法。
The experimental study of maxillary protraction through bone suture expansion in animals
上颌骨复合体骨缝牵张的动物实验研究
Results The new anchorage implants were stable almost in every protraction experimental study.
结果在所有实验中支抗种植体稳定性良好。
Trentment of mixed dentition skeletal crossdite by bonded biteplate with maxillary protraction
粘接牙合垫伴前方牵引矫治替牙期骨性反牙合
Establishment of an experimental animal model of maxillary protraction and cephalometric analysis
上颌前牵引动物模型建立与头影测量分析
To investigate the therapeutic effects of maxillary expansion and protraction in the primary dentition.
探讨在乳牙期利用固定扩弓矫治器前牵引的临床效果。
Based upon neural networks, a nonlinear mathematical model of the protraction for the thermal expansion die bolt is developed.
基于神经网络建立热膨胀螺栓形变的非线性数学模型。
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