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Tunnelling
['tʌnəliŋ]
Definition
(
-
) of Tunnel
Typist: Nelda
Examples
As
the
rock
drill
made
a
revolution
in
blasting
and
tunnelling
,
so
the
Blake
crusher revolutionised
the
art
of
road
making
.
William Henry Doolittle.
Inventions in the Century
.
Checked by Abram
