Keto-enol tautomerism is the most common tautomery phenomenon.Keto -enol themselves are the real chemical substance.

酮及烯醇互变是互变作用最普通现象,它们都是真实实体。

The distribution as well as the content of the particles in N-P electroless codeposits is determined by means of conventional stereome-tric metallograph.

介绍用普通体视金相法,可以很容易地测定复合镀层中固体微粒分布形态及其含量。

PVC, Teflon and fluorion diaphragm were found to be better than glass as materials of diaphragm cell for their advantages in corrosion resistance as well as less electric resistance.

以聚乙烯、聚四氟乙烯和全氟离子隔膜为材料套管式隔膜电解槽具有隔膜亲水性强、电阻小、耐碱液腐蚀、耐盐氧等优点，与平板式隔膜电解槽采用普通玻璃和硼硅玻璃相比是更加理想电合成盐电解槽及隔膜材料。