id	keyword
fis-1957	creep
fis-1957	lead
fis-1957	strain
fis-1957	steel
fis-1957	fracture
fis-1957	air
fis-1957	stress
fis-1957	time
fis-1957	mpa
fis-1957	specimen
fis-1957	fig
fis-1957	mode