Helmet and programmable logic controller: what they have in common

1. Step 1. Helmet — is made of — Kevlar. Modern ones are aramid.
2. Step 2. Kevlar — is material for — International Space Station. The micrometeoroid shielding is Kevlar and Nextel.
3. Step 3. International Space Station — has part — Industrial robot. The Canadarm2 robotic arm.
4. Step 4. Industrial robot — is used in — Industrial automation. Robots.
5. Step 5. Industrial automation — uses — Programmable logic controller. Controllers.

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