Definition of Jack post
one
of
the
posts
which
support
the
crank
shaft
of
a
deep-well-boring
apparatus
.
See also:
Jack
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Jacaranda
Jacare
Jacchus
Jacconet
Jacent
Jacinth
Jack
Jack arch
Jack back
Jack block
Jack boots
Jack crosstree
Jack curlew
Jack frame
Jack Frost
Jack hare
Jack Ketch
Jack lamp
jack pins
Jack plane
Jack pot
Jack rabbit
Jack rafter
Jack salmon
Jack sauce
Jack shaft
Jack sinker
Jack snipe
Jack staff
Jack the Giant Killer
Jack timber
Jack towel
Jack tree
Jack truss
Jack yard
Jack-a-dandy
Jack-a-lent
Jack-at-a-pinch
Jack-at-all-trades
Jack-by-the-hedge
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