求翻译：砂石料进场前，必须以《公路工程水泥混凝土试验规程》的标准为依据，进行试验，确保不合格的材料不进场。浇筑混凝土前，由监理工程师、指挥部质检人员现场检查砂石料质量，如有疑问，则再次进行试验，确保不合格的材料不使用。对于不符合质量要求的砂、石料立即清除出施工现场。是什么意思？

Before entering the aggregate, must be "concrete highway engineering test procedures" standard as the basis for testing, to ensure that substandard materials are not admitted. Before pouring the concrete, by the supervising engineer, quality control personnel on-site inspection headquarters aggregat

sand stone approaching, it must be based on the highway before cement concrete test based on the standards of the Statute, and conducting a trial to ensure that no qualified materials that do not come. before pouring concrete, by supervising engineers staff on-site inspection of Quality Supervision,

Before the granulated substance stone material approach, must by "Highway engineering Cement concrete Experiment Regulations" the standard is the basis, carries on the experiment, guarantees the unqualified material not to enter the arena.In front of the concrete, by oversees engineer, the headquart

Before the entry of aggregate, must be based on the criteria of the specification for cement concrete in highway engineering test on the basis of tests, ensure that unqualified materials is not the venue. Before pouring concrete, by supervising engineer, headquarters for quality control personnel at

Before entering the aggregate, must be "concrete highway engineering test procedures" standard as the basis for testing, to ensure that substandard materials are not admitted. Before pouring the concrete, by the supervising engineer, quality control personnel on-site inspection headquarters aggregat