id	keyword
iogr-1334	sand
iogr-1334	topaz
iogr-1334	quartz
iogr-1334	topaz sand
iogr-1334	hydraulic
iogr-1334	fracturing
iogr-1334	quartz sand
iogr-1334	proppant
iogr-1334	test
iogr-1334	results
iogr-1334	sieve
iogr-1334	oil
iogr-1334	sphericity