2003 - Volume #27, Issue #1, Page #33
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Bolt-Down Trailer Lock
There are a number of different products on the market to lock up trailer hitches but British inventor James Sheldrick took a different approach.
  He wanted something that would be anchored to the ground and that could be driven over. His solution was a chunk of steel plate bolted to a cement slab and fit..........


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2003 - Volume #27, Issue #1