prov:value
| - Examples of the solvents, which may be employed in the intermediate layer 3, include lower alcohols, such as methyl alcohol, ethyl alcohol, n-propyl alcohol, and n-butyl alcohol; chlorine atom-containing hydrocarbons, such as methylene chloride and ethylene chloride; ketones, such as acetone, methyl ethyl ketone, and methyl isopropyl ketone; esters of lower fatty acids with lower alcohols, such as
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