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| 配方类型： |
MISCELLANEOUS |
| 配方说明： |
Test for Water in Gasoline |
| 配制方法： |
Heat copper sulfate on a metal plate until color changes from a deep blue to a very light blue. Put in a tightly closed bottle. To use put a little of this in gasoline, to be tested. If the copper sulfate turns deep blue then water is present. |
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