id	keyword
american_scientific_journal-4338	welding
american_scientific_journal-4338	alloy
american_scientific_journal-4338	steel
american_scientific_journal-4338	alloy steel
american_scientific_journal-4338	repair
american_scientific_journal-4338	electrode
american_scientific_journal-4338	metropolis
american_scientific_journal-4338	tensile
american_scientific_journal-4338	participants
american_scientific_journal-4338	study
american_scientific_journal-4338	skills
american_scientific_journal-4338	steel welding