Various methods are employed by dairies to prevent raw milk spoilage in silos.乳品厂已采用各种方法来防止原料乳在地下室变质.The types and homogenizing principles of blending silos were described.介绍了粉体混料仓的型式及掺混原理.Lateral clinker bulking systems...
Maybe you fall asleep in class because of uncorrected astigmatism.也许你在课堂上睡觉是因为你的眼睛散光.They have what is called astigmatism.他们有所谓散光.Under astigmatism even narrow parallel light beams will not combine into one point.有象散存在时甚...