| 摘要 |
An inverted generally U-shaped tongue affixed to the front end of a trailer with the forward downwardly directed end thereof having a downwardly directed opening therein and an upwardly projecting member affixed generally centrally in a truck body, which member is constructed to be received within the opening in the tongue, said tongue and member having transverse, aligned openings therethrough with a pin receivable therein. A jack is incorporated in the front end of the trailer to raise and lower the tongue to disengage and engage it with the member mounted in the truck box.
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