id	keyword
ajst-29862	factors
ajst-29862	pipeline
ajst-29862	embrittlement
ajst-29862	system
ajst-29862	safety
ajst-29862	shield
ajst-29862	impact
ajst-29862	construction
ajst-29862	vol
ajst-29862	tunnel
ajst-29862	model
ajst-29862	analysis
ajst-29862	settlement
ajst-29862	gas
ajst-29862	control
ajst-29862	degree