Blowpipe gathering end and shaduf: what they have in common

1. Step 1. Blowpipe gathering end — is part of — Glassblowing. A thickened end on which the melt is gathered.
2. Step 2. Glassblowing — is used in — Glass bottle. Blowing.
3. Step 3. Glass bottle — has part — Cork. A cork.
4. Step 4. Cork — is used in — Corkscrew. It pulls out the cork.
5. Step 5. Corkscrew — uses — Lever. Lever corkscrews.
6. Step 6. Lever — is used in — Shaduf. A shaduf is a lever with a counterweight.

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