Furnace arched roof e zip: o que têm em comum

1. Passo 1. Furnace arched roof — faz parte de — Open-hearth furnace. A refractory roof.
2. Passo 2. Open-hearth furnace — é feito de — Tijolo. An open-hearth furnace is built of firebrick.
3. Passo 3. Tijolo — utiliza — Trowel. Bricklaying with a trowel.
4. Passo 4. Trowel — funciona como — Shovel. A trowel is a mason's small flat shovel.
5. Passo 5. Shovel — utiliza — Wedge. The blade enters the ground like a wedge.
6. Passo 6. Wedge — faz parte de — Zip. The slider works like a wedge, bringing the teeth together and pushing them apart.

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