flow extraction and separation
multilevel cross-flow extraction
pressurized counter-flow extraction
Continuous flow liquid membrane extraction
Flow Injection onLine Extraction
flow injection on-line extraction
Extraction and back extraction
extraction and back-extraction
Extraction or Non-Extraction Plan
extraction-anti-extraction
Extraction-Back-Extraction
Oil Extraction Office of No.3 Oil Extraction Factory
CBF(①cerebral blood flow ②clinical blood flow-meter)
coupling of channel flow with seepage flow
downward flow-upward flow