Denwaki oyobi tanshiki koukanki mokuroku

Denwaki oyobi denwa koukan

Denwaki oyobi fuzokuhin : eiwa taiyaku

Koukanki dousa oyobi shougai shuurihou

Koukanki dousa oyobi shougai shuurihou

Koukanki dousa oyobi shougai shuurihou

Koukanki dousa oyobi shougai shuurihou

Denwaki shiyouhou

Denwa koukan kisoku : fu denwa koukan kanyuusha kokoroe narabini denwaki shiyou kokoroe

Denwaki shiyou mondou

Nikkan oufuku shoshiki oyobi oufuku mokuroku

Gaishi konkurīto gaikan oyobi denchirui mokuroku

大船電話交換局交換機

Shashin kikai oyobi yakuhin shashinban oyobi sekiban kigu zukai mokuroku

Jidoushiki denwa koukan

Bunmei riki denwaki shiyou mondou

Bunmei riki denwaki shiyou mondou

Bunmei riki denwaki shiyou mondou

Tenran shiryou mokuroku oyobi kaisetsu

Keikyou bunken oyobi ibutsu mokuroku

Kagaku kikai oyobi yakuhin mokuroku

Keikyou bunken oyobi ibutsu mokuroku

Tenran shiryou mokuroku oyobi kaisetsu

Tokkyo oyobi touroku jitsuyou shinan mokuroku

Denshin oyobi denwa