72196318
Jun 23, 1964
Jun 22, 1965
SEISMIC EXPLORATION MEASUREMENT DEVICES-NAMELY, DEVICES FOR MEASURING THE TIME OF TRANSMISSION OF SEISMIC SHOCK WAVES THROUGH THE EARTH, ELECTRICAL SYSTEMS AND APPARATUS FOR ANALYZING THE TRANSMISSION OF SEISMIC SHOCK WAVES THROUGH THE EARTH, AND PARTS FOR SUCH DEVICES
Fancy Goods