| 摘要 |
The invention is concerned with an explosive device for seismological marine reconnaissance, the device comprising a tubular casing containing the explosive charge and a detonator in which the detonator is provided with a plastics closure plug the plug being extended so that it projects beyond the end of the detonator and engages in the bottom opening in the casing containing the charge so as to seal the same against the ingress of seawater. To increase the sealing action the bottom end of the casing may comprise a conical portion terminating in a cylindrical neck, the extended end of the aforesaid plug having a flange for co-operation with the said conical end of the casing. |
