Gradl格拉德尔gradabbr.毕业生；校友（=graduate)Grading model分级模型grading table分级台Grad gradient梯度grading curve颗粒级配曲线,粒度曲线grading trend级配走向grading sieve分级筛,清选筛grading panel分品板grading group分品复接群grading ruler放缩规则grading angle坡角