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Explanation: If I've got the wrong context then I am talking nonsense. As in my other answer on this piece of text, I have guessed that this is to do with tractors linking up with trailers, where "accrochage" refers to the tractor reversing back and linking up with its trailor.
Maybe a little more context could have helped...
Adam Thomson Local time: 08:41 Native speaker of: English PRO pts in pair: 98