វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
តូច
មធ្យម
ធំ
gallnuts
is a form of:
Counterbore
ENGLISH MEANING
noun
1.
A
flat-bottomed
cylindrical
enlargement
of the
mouth
of a
hole
,
usually
of
slight
depth
, as for
receiving
a
cylindrical
screw
head
.
2.
A
kind
of
pin
drill
with the
cutting
edge
or
edges
normal
to the
axis
; --
used
for
enlarging
a
hole
, or for
forming
a
flat-bottomed
recess
at
its
mouth
.
verb
1.
(TRANSITIVE)
To
form
a counterbore in, by
boring
,
turning
, or
drilling
; to
enlarge
, as a
hole
, by
means
of a counterbore.