Basic formulation, main technique index and sand control mechanism for agglutination sand are introduced.
介绍了胶合砂的基本配方、主要技术指标及防砂机理。
The essence of course culture is the most basic, deepest and final formulation.
课程文化的实质，是课程文化最根本、最深层、最终极的规定性。
The essence of course culture is the most basic, deepest and final formulation.
课程文化的实质，是课程文化最根本、最深层、最终极的规定性。
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