id	keyword
american_scientific_journal-3271	contact
american_scientific_journal-3271	stress
american_scientific_journal-3271	gear
american_scientific_journal-3271	stresses
american_scientific_journal-3271	bending
american_scientific_journal-3271	model
american_scientific_journal-3271	results
american_scientific_journal-3271	figure
american_scientific_journal-3271	spur