应用卤电极检验微量水泥
1·The mature craftsmanship of stone tools also generates typical microlith assemblage such as scrappers, daggers, stone arrowheads and engraving tools.
成熟的石器工艺技术加工出典型的端刮器、琢背刀、石镞与雕刻器等典型的细石器组合。