?选别材堆场
... 级别 rank; level; grade; scale; sort; rating 干部级别 the rank of a cadre; 工资级别 wage scale; grade on the wage scale; 外交级别 diplomatic rank; 不论级别高低 no matter what their ranks; 这样做会打乱工资级别制度。 that would upset the wage differential. 它们被仔细地分成各种级别。 they are carefully graded 选别材堆场 stacking stall 选别材堆物 stacking stall ...