Horse collar e screw press: o que têm em comum

1. Passo 1. Horse collar — faz parte de — Horse collar. A rigid ring on the horse’s shoulders.
2. Passo 2. Horse collar — é feito de — Leather. The collar and traces are leather.
3. Passo 3. Leather — é material para — Tourniquet. The strap of a tourniquet is leather.
4. Passo 4. Tourniquet — tem como parte — Screw thread. Petit’s tourniquet was tightened with a screw.
5. Passo 5. Screw thread — evoluiu de — Screw. A thread is an application of the screw.
6. Passo 6. Screw — é utilizado em — Screw press. The force is produced by turning a screw.

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