Anti-lockup coating solution and preparation method, metal threaded connecting piece and preparation method
The invention relates to an anti-lockup coating solution and a preparation method of the anti-lockup coating solution. Common sea shells or fresh water shells are selected and used to be main raw materials. The preparation method comprises the specific steps of dissolving, dispersing, centrifugalizi...
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Format: | Patent |
Sprache: | chi ; eng |
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