pphm

英['piːp'iː'etʃ'em] 美['piːp'iː'etʃ'em]
  • =partsperhundredmillion亿分率(0.;000001%25)
  • pph n.小册子
  • pph. pamphlet;abbr.;=pamphlet
  • PPHA =PeakPulseHeightAnalysis峰值脉冲高度分析
  • pphm =partsperhundredmillion亿分率(0.;000001%25)