A movable seismic communication device consisting of a tube and an impactor placed in the tube can move along the tube under internal gas pressure to strike a broken line touching one end of the tube, generating an energy wave and an adjustable base. Pipe and first floor mine

摘要

Communication Device, which comprises a portable Seismic Tube that has a Lower portion and an Upper portion, a Pin placed in the tube and movable along the tube.And an adjustable base oriented between the tube and a floor of Mine, being extensible and retractable adjustable base Anvil for a contact.