វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
តូច
មធ្យម
ធំ
Block system
noun
1.
ប្រព័ន្ធប្លុក
ENGLISH MEANING
1.
A
system
by
which
the
track
is
divided
into
short
sections
, as of three or four
miles
, and
trains
are so
run
by the
guidance
of
electric
, or
combined
electric
and
pneumatic
,
signals
that
no
train
enters
a
section
or
block
until
the
preceding
train
has
left
it, as in
absolute
blocking
, or
that
a
train
may
be
allowed
to
follow
another
into
a
block
as
long
as it
proceeds
with
excessive
caution
, as in
permissive
blocking
.