From pre- + flush. <span class="searchmatch">preflush</span> (plural preflushes) A preliminary flush 2015 July 17, “High-Throughput Method of Whole-Brain Sectioning, Using the Tape-Transfer...
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Wang, Flow Assurance, page 166: The first stage was 21.4 m3 crude oil <span class="searchmatch">preflush</span> containing 2800-ppm paraffin dispersant, followed by 11.1 m3 treating mixture...