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2187
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1.
within
radiotelephone
-
coverage
of at
least
one
MF
-
coast
station
,
continuous
alerting
2187
.
5
kHz
and
radiotelephony
services
are
available
.
哪个
海区
至少
被
一个
中频
岸
站
覆盖
,
不断
发出
警报
的
2187.5
千赫
和
无线电话
服务
可用
nǎ ge
hǎi qū
zhì shǎo
bèi
yī gè
zhōng pín
àn
zhàn
fù gài
,
bú duàn
fā chū
jǐng bào
de
liǎng qiān yì bǎi bā shí qī diǎn wǔ
qiān hè
hé
wú xiàn diàn huà
fú wù
kě yòng
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