Optical sensors and cables; optical-seismical sensors and cables; seismical and geophysical apparatus and instruments, namely, seismometers, accelerometers, hydrophones, magnetometers and electric field sensors; apparatus and instruments for searching for oil and gas and for production of oil and gas, namely, ground penetrating acoustic, and/or electromagnetic field apparatus; apparatus and instruments for measuring and checking, namely, apparatus for imaging and monitoring of sub-surface for...

Optical sensors and cables; optical-seismical sensors and cables; seismical and geophysical apparatus and instruments, namely, seismometers, accelerometers, hydrophones, magnetometers and electric field sensors; apparatus and instruments for searching for oil and gas and for production of oil and gas, namely, ground penetrating acoustic and/or electromagnetic field apparatus; apparatus and instruments for measuring and checking, namely, apparatus for imaging and monitoring of sub-surface form...