w=c So, I have my level surface, w equals c I have a curve on that, and at some point I'm going to have a certain velocity.
画出等值面,上面有一条曲线,某点处，有某个速度。
The scatter of WC grain fineness is referred to the fineness homogeneity of raw material W particle and the fineness of grain is influenced by the surface perfectness for thick W pattiel- es.
WC晶粒度的分散性与原始W颗粒度的均匀性有关，对于粗W粉，其颗粒完整性对WC的晶粒度有影响；
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