以该法的砂型性能良好与砂型硬度高度均匀以及噪声测定水平，来显示此法的特色。
Features of this process have been demonstrated from the good characteristics and excellently even hardness of the sand mold, and low noise level detected.
得出的结轮是提高压头压下速度能提高砂型表面硬度。
Thus we got a conclusion that increasing the velocity of pressing can increasing the hardness of sand mould surface.
本文从理论和实践的两个角度，论述了D型湿砂型表面硬度计的设计思想，定型设计方案。
The ideal of the design and finalized programme of the type-D green mold hardness tester are expounded by the theory and the experiments.
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