Base isolation and fuel cell: what they have in common

1. Step 1. Base isolation — is made of — Vulcanized rubber. Rubber–steel bearings.
2. Step 2. Vulcanized rubber — is material for — Weather balloon. The envelope is rubber or latex.
3. Step 3. Weather balloon — is made of — Hydrogen. Filled with hydrogen or helium.
4. Step 4. Hydrogen — is used in — Fuel cell. The fuel is hydrogen.

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