id	keyword
american_scientific_journal-6574	nozzles
american_scientific_journal-6574	scale
american_scientific_journal-6574	pressure
american_scientific_journal-6574	chamber
american_scientific_journal-6574	removal
american_scientific_journal-6574	paraffin
american_scientific_journal-6574	arrangement
american_scientific_journal-6574	figure
american_scientific_journal-6574	deposit
american_scientific_journal-6574	tubing
american_scientific_journal-6574	descaling
american_scientific_journal-6574	production