id	keyword
ajst-22354	coal
ajst-22354	et al
ajst-22354	fracturing
ajst-22354	effect
ajst-22354	temperature
ajst-22354	liquid
ajst-22354	nitrogen
ajst-22354	rock
ajst-22354	ln2
ajst-22354	permeability
ajst-22354	water
ajst-22354	lnf
ajst-22354	pore