The purification of technical naphthalene by stepped static crystallization method in cracked aromatic fraction, which is rich of naphthalene has been developed.
以富含萘的裂解芳烃馏分为原料，开发静态分步结晶法从芳烃馏分中提纯工业萘。
Fractional crystallization and assimilation constrain lithological composition and fraction, and play a key role in the formation of intrusive complex.
结晶分异和同化混染是侵入岩体形成过程中控制岩相成分和分异程度的主导因素。
Fractional crystallization and assimilation constrain lithological composition and fraction, and play a key role in the formation of intrusive complex.
结晶分异和同化混染是侵入岩体形成过程中控制岩相成分和分异程度的主导因素。
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