词汇	vacuum preconcentrator
释义	vacuum preconcentrator 真空预浓缩器
随便看	effective depth of beam effective depth of hardening effective depth of improvement effective depth of reinforcement effective depth of section effective depth of slab Effective depth penetration Effective depth penetrationEDP Effective depth penetration EDP effective depty effective descriptive set theory effective design management effective desk area effective devaluation effective development effective development ratio effective development strategy effective deviatoric stress ratio effective deviator stress ratio effective devise effective diameter effective-diameter effective diameter equivalent effective diameter of bellows effective diameter of grain