id	keyword
esrj-70539	content
esrj-70539	gas
esrj-70539	toc
esrj-70539	shale
esrj-70539	adsorption
esrj-70539	longmaxi
esrj-70539	gas content
esrj-70539	ch4
esrj-70539	capacity
esrj-70539	samples