Dobre wyniki podwodne hydrofonu HJ-8C-Ⅱ dwukrotnie detektor podmorskiego kabla

Underwater Hydrophone HJ - 8C - Ⅱ double detector ( for submarine cable ) ​ Fast detailed description: HJ-8C- II dual detector unit is used to compensate for the lack of ocean exploration P wave reception. Not only for the exploration of the sea can also be used in the transition zone of exploration. HJ-8C- II dual detector unit with two high performance super land geophone with universal structure and a piezoelectric detector is composed of. Liquid damping land inspection