Offers GPR
Kadimendium SIM800L Module GSM GPRS SMS 5V Module Wireless Extension Module with Antenna Replacement for SIM900A (blue1)
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GPR / Seismic Tomography for Delineating Subsurface Structure: Detect local anomalies at shallow depths using geophysics
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GPRS GSM Breakout Module Binghe GPRS GSM MicroSIM Module with Quad-Band 850/900/1800/1900MHz SIM Card Slot + PCB Antenna, 3.7~4.2V, TTL Serial Interface Suitable for IoT Devices
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