. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "SDN:L05::153" . "2010-02-19 11:58:13.0" . . . "" . . . . . "2010-02-19 11:58:13.0" . "SDN:L05::153" . . . "An energy source of unspecified frequency plus a single string of towed hydrophones (streamer) that determine geologic structure by detecting waves reflected by subsurface layers."@en . . . . . . "2" . . . . "SDN:L05::153" . . "2" . . . "accepted"@en . "false" . "single-channel seismic reflection systems"@en . . . . . . . . . . . . . . . . . . . . .