单词	寄生反射波
释义	寄生反射波医parasitic echo
随便看	part span shroud of blade parts peculiar parts per billion parts-per-billion parts per billion concentration parts per billionppb parts per billion ppb parts per hundred concentration partsper hundred million parts per hundred million parts per hundred million concentration parts per hundred millionpphm parts per hundred parts of rubber parts per million ppm parts per minute partsper thousand parts per thousand parts requisition and order request partss parts sectional vie parts sectional view parts selection matching parts per million parts-per-million parts per million carbon