Last Updated：2026/01/01
Sentence
A
narrow
gallery,
termed
the
air-head,
is
carried
in
the
upper
part
of
the
coal,
in
the
rib
walls,
along
one
or
more
of
the
sides.
In
the
example
here
figured,
it
is
carried
all
round,
and
the
air
enters
at
the
bolt-hole
e.
Lateral
openings,
named
spouts,
are
led
from
the
air-head
gallery
into
the
side
of
work;
and
the
circulating
stream
mixed
with
the
gas
in
the
workings,
enters
by
these
spouts,
as
represented
by
the
arrows,
and
returns
by
the
air-head
at
g,
to
the
upeast
pit.
Quizzes for review
A narrow gallery, termed the air-head, is carried in the upper part of the coal, in the rib walls, along one or more of the sides. In the example here figured, it is carried all round, and the air enters at the bolt-hole e. Lateral openings, named spouts, are led from the air-head gallery into the side of work; and the circulating stream mixed with the gas in the workings, enters by these spouts, as represented by the arrows, and returns by the air-head at g, to the upeast pit.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
