3D. W. Dabill, J. A. Groves, D. R. Lamont. The Effect of' Pressure on Portable Gas Monitoring Equipment During Compressed Air Tunnelling [J]. The Annals of Occupational Hygiene, 1996, 40 (1): 11-28.
4Atom. System Controls Toxic Gases in Tunnels [J].Public Works, 1996, (6): 43-46.
