受砾屑硅质岩、含砾砂屑硅质岩控制。
而在我国有大量的硅质石屑因为粘土含量过高而被当作废弃物堆积起来。
But the massive siliceous crushed stones pile up as solid waste disposals in our country excessively because of the clay content.
对于采用聚晶金刚石刀具加工硅铝合金时产生积屑瘤的一些规律进行了研究。
A study on the trends of silver white chip formation when cutting the silicon-aluminium alloy parts with a polymerized crystal diamond cutter is carried out.
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