词汇	sum clause
释义	sum clause 求和子句
随便看	displacement vector of joint displacement velocity displacement-velocity graph displacement ventilation displacement ventilation effect displacement ventilation system displacement ventilation with cooling ceiling displacement vessel displacement vibration amplitude transducer displacement voltage displacement volume displacement wake displacement washing displacement washingfilter cake displacement washing filter cake Displacement Water Line displacement water ratio displacement water ratio, Amott water ratio displacement wave displacement weight displacement zero-lift displace meter displace metre displacemet-time diagram displacemnt prediction