Adopting appropriate catalyst and controlling ethylene mass fraction at 7% can endow the resin with excellent impact resistance.

选择合适的催化剂及控制乙烯质量分数为7%，可使树脂获得良好的抗冲击性能。

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The results have shown that diameter, gas fraction and fluid viscosity have slight impact on flow rate of this boosting system, but have remarkable influence on pressure drop of this system.

研究结果表明，管径、含气率以及流体粘度对管泵系统的流量影响不大，而对压力降则有显著影响。

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In addition, left ventricular ejection fraction remained normal and there was minimal impact on aortic valve function after TEVAR.

此外，随访期左室射血分数正常，术后主动脉瓣功能几无影响。

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In addition, left ventricular ejection fraction remained normal and there was minimal impact on aortic valve function after TEVAR.

此外，随访期左室射血分数正常，术后主动脉瓣功能几无影响。

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