Night whitening agent and the enzyme orientation on the tooth die, the die 20 minutes later wearing a tooth can be removed, with 9 consecutive days.
每晚将美白剂和定向酶放在齿模里，戴着齿模20分钟后即可取下，连续使用9天。
The response of the polymer melt behavior of orientation for axial vibration of screw in short pipe extrusion die head was studied by the light scattering technology.
利用光散射测量方法研究了短圆管挤出模头中聚合物熔体取向行为对螺杆轴向振动的响应。
It is also predicted that the orientation ratio responds to the die channel length, the channel area expanding ratio of die and plastics melt viscosity.
此外还预测了扩张机头流道长度，面积扩张比、塑料熔体粘度对取向度也有影响。
It is also predicted that the orientation ratio responds to the die channel length, the channel area expanding ratio of die and plastics melt viscosity.
此外还预测了扩张机头流道长度，面积扩张比、塑料熔体粘度对取向度也有影响。
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