请教一个句子的翻译

Other types of additives have also been proposed, and among these various surfactants which promote the wetting of the substrates with which the alkali metal silicate solution is in contact.
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后半个并列句的主句的谓语动词在哪里？

Other types of additives have also been proposed, and among these various surfactants which promote the wetting of the substrates with which the alkali metal silicate solution is in contact.

还提出了其它种类的添加剂，在这些添加剂中，碱金属硅酸盐溶液与促进基体润湿的各种表面活性剂进行接触。

翻译得对否？请高手们指点……