| http://www.w3.org/ns/prov#value | - The shackle lock as claimed in claim 1, wherein said second shackle connecting member of said shackle unit is formed with a slot that communicates with said second channel, said retaining member including a retaining block mounted slidably in said slot, and a biasing spring received in said slot for biasing said retaining block to extend out of said slot and into said second channel so as to preve
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