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jackstay
jackstone
jackstones
jackstraw
jackstraws
Jacob (1)
Jacob (2)
Jacob’s ladder
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jackscrew
jack·screw [ ják skr ] (plural jack·screws)


noun 
Definition:
 
mechanical engineering 
Same as  screw jack
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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