这种改进大大增加了有效射流长度，可使聚能装药的破甲威力大幅度提高。
Through these design ways, the valid length of jet and the penetration power of shaped charge were improved evidently.
测量了该吸气流动在不同工况下的临界射流速度、速度场分布、有效作用范围。
Measures critical jet velocity, velocity field distribution and effective limits of this suction-airflow under different conditions.
此外，八份观察研究中的四份表明个人注射流感疫苗对防止心脏病或心血管事件有效果。
In addition, four out of eight of these observational studies indicated there was a protective effect against heart attacks or cardiovascular events in individuals vaccinated against influenza.
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