prov:value
| - Examples of preferred liquids of this type are hydrocarbons, such as n- and isopentane, technical-grade pentane mixtures, n- and isobutane and propane, ethers such as furan, dimethyl ether and diethyl ether, ketones, such as acetone and methyl ethyl ketone, esters, such as ethyl acetate and methyl formate, and preferably halogenated hydrocarbons, such as methylene chloride, difluroromethane, trich
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