Paper and board - calibration of variable - area flowmeters 紙和紙板.變積式流量計(jì)的校準(zhǔn)
Variable - area nozzle 可變截面噴管
Variable - area methods 可變面積法
The flow field structure of the power - turbine variable - area nozzle stage of a marine gas turbine 船用燃?xì)廨啓C(jī)動(dòng)力渦輪可調(diào)導(dǎo)葉級(jí)的流場(chǎng)結(jié)構(gòu)