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从发射探头1到接收探头 2间的声波信号
geophys. signature from transmitter 1 to receiver 2
从发射探头2到接收探头 2间的声波信号
geophys. signature from transmitter 2 to receiver 2
从发射探头1到接收探头 1间的声波信号
geophys. signature from transmitter 1 to receiver 1
从发射探头2到接收探头 1间的声波信号
geophys. signature from transmitter 2 to receiver 1