English Version(英文版)
|
EBooks(电子书)
Switchboards
[s'wɪtʃbɔ:dz]
例句:
In
addition
,
stock
tickers
, telephones,
telephone
switchboards
,
and
typewriters
were
made
the
Hammond
typewriters
were
perfected
and
made
there
.
弗兰克·刘易斯·戴尔.
爱迪生的生平和发明
.
迪尔德丽手打
