id	keyword
esrj-74167	support
esrj-74167	mining
esrj-74167	coal
esrj-74167	coalface
esrj-74167	support stability
esrj-74167	angle
esrj-74167	strike
esrj-74167	seam
esrj-74167	dip
esrj-74167	zhang
esrj-74167	roof
esrj-74167	journal