Latex in order to prevent deterioration, usually a certain amount of ammonia as a preservative.

乳胶，以防止恶化，通常是作为防腐剂氨一定的数额。

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Latex in order to prevent deterioration, usually a certain amount of ammonia as a preservative.

乳胶，以防止恶化，通常是作为防腐剂氨一定的数额。

youdao