The Application of Rebound Hardness Value Way Measuring Strength to Prestressed Concrete Cylinder Pipe 回弹法测强在预应力钢筒混凝土管道中的应用
Here we use the rebound interval of punch pin instead of height to made of hardometer which can measure the hardness of wood in spot. 本研究将测量高度改变为精确测定冲头回跳时间间隔,制成冲击式木材硬度计。可以在现场测定木材硬度。