Show Crop's got it right. That's a seismic crew. They either set off explosives to make a shockwave, or these vibratory trucks, and they have long strings of microphones that look like orange extension cords strung along the ground. It's like echo sounding when ships are looking for submarines, but now they're looking to see what rock formations are underground. Very common in the oil and gas industry, although it is also done by universities or government just to do research on local geology. If it's industry, probably oil, maybe mining, depending on your location.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for �200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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