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Switchboards
[s'wɪtʃbɔ:dz]
例句/造句/用法:
In
addition
,
stock
tickers
, telephones,
telephone
switchboards
,
and
typewriters
were
made
the
Hammond
typewriters
were
perfected
and
made
there
.
弗蘭克·路易斯·戴爾.
愛迪生的生平和發明
.
迪尔德丽手打
