单词	helium balance line
释义	helium balance line 平衡管
随便看	rate-of-penetration log rate of penetrationrop rate of penetration rop rate of people having many children rate of percolation rate of perfect kernel rate of perforation rate of performance rate of permeability rate of permeation Rate of personnel loss rate of perspiration rate of phase 4 depolarization rate of phase-4 depolarization rate of phase change rate of photosynthesis yield rate of photosynthisis rate of phototendering rate of piece wage rate of piece-wage Rate of pilling of fabrics rate of pitch rate of planned brith rate of plant coverage rate of pollution contribution