“PF”概念、定义、翻译-科学时代

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

单词	PF
释义	请查阅PF--PF（phonetic form）
随便看	nozzle nozzle nozzle nozzle nozzle area contraction ratio nozzle area expansion ratio nozzle base drag nozzle blade nozzle box nozzle clamp nozzle closure opening pressure nozzle coefficient nozzle diaphragm（固体火箭发动机的） nozzle discharge nozzle divergence half angle nozzle dyeing machine nozzle effect nozzle enrichment process nozzle expansion ratio nozzle flowmeter nozzle flowmeter nozzle flowmeter nozzle guide vane nozzle-hydraulic manure cleaning equipment nozzle initial divergence angle