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  • what is the meaning of two level locksets?

    ANONYMOUS | offlineLv1 | Expired Date：2009.11.10 11:25

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what is the meaning of two level locksets?

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John | offline Lv9 | Answer Date：2009.10.21 19:32 (0) | (0)

It may be referring to locks, which generally come in pairs (sets), due to their function.  They allow boats to travel between two different waterways that have two different levels.

 

(Chinese invention, credited incorrectly in most western history books to DaVinci)

 

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leilei | offline Lv12 | Answer Date：2009.10.21 13:45 (0) | (0)

二级锁具？

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