Double seam of a can e modem: o que têm em comum

1. Passo 1. Double seam of a can — faz parte de — Lata de conserva. A sealed seam between the lid and the bottom.
2. Passo 2. Lata de conserva — é feito de — Tin. Tinplate.
3. Passo 3. Tin — é material para — Phonograph. The recording is on tin foil.
4. Passo 4. Phonograph — foi inspirado por — Electrical telegraph. Edison came to the phonograph while working on recording telegraph and telephone signals.
5. Passo 5. Electrical telegraph — evoluiu para — Telephone. The telephone grew out of attempts to send several signals over telegraph lines (the “harmonic telegraph”).
6. Passo 6. Telephone — é utilizado em — Modem. It works over a telephone line.

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