获取显示材料真实性质和状态的沥青样品指南。从车辆罐、地面固定罐、起点和终点的铁路罐中取样沥青的方法。强调严格控制程序的必要性。

Guide to obtaining asphalt samples that show true nature and condition of material. Methods for sampling asphalt from vehicle tanks, above-ground stationary tanks, railroad tanks at origin & destination. Stresses necessity for strict control procedures.