Heat-sealed seams e caldeira: o que têm em comum

1. Passo 1. Heat-sealed seams — faz parte de — Plastic bag. Heat-sealing of the bottom and sides.
2. Passo 2. Plastic bag — é feito de — Polyethylene. Polyethylene.
3. Passo 3. Polyethylene — é feito de — Crude oil. Made from petroleum products.
4. Passo 4. Crude oil — utiliza — Oil well. Oil is extracted from wells.
5. Passo 5. Oil well — é feito de — Wrought iron. The casing pipes are iron.
6. Passo 6. Wrought iron — é material para — Caldeira. Later — made of sheet wrought iron.

Abrir Evothings