graden.等级;年级;成绩;斜坡v.分级;评分;渐次变化
Grade enter级进
graded shot分选细粒
grade theme年级主题
grade field等级域
grade staken.坡度桩
Grade eight八年级
graded tube刻度管
grade ratio坡度比
grade steel品种钢
graded area交替区域