Application to determination of peak expiratory flow rate in asthma in children 儿童最大呼气流率测定及其在哮喘防治中的应用
Plastics piping systems . fittings , valves and ancillaries . determination of gaseous flow rate pressure drop relationships 塑料管道系统.配件阀门和辅助设备.气流率压降关系的测定
The research indicated that the airbag volume , vent hole size and gas generate mass flow rate exert dominant influence on the protection effectiveness of the occupants . the paper pointed out that small airbag volume , small vent hole size and low gas generate mass flow will provide the occupants with best protection in the mini - van frontal crash 研究结论表明气囊体积、气囊排气空截面积和气体发生器类型对气囊的防护效率有重要影响,并提出对于驾、乘人员安全气囊系统,小体积气囊、小排气孔截面积和高气流率的发生器的组合将产生最佳防护效果。