Multiplexed hydrophone group signals designed to operate at depths exceeding 35 m or having an adjustable or removable depth sensing device in order to operate at depths exceeding 35 m; or
6. 多工传输的水下听音组合群信号工作深度越过35米，或带有可调节或可更换的深度敏感器件能使工作深度超过35米；或