Bra shoulder straps and smartphone: what they have in common

1. Step 1. Bra shoulder straps — is part of — Bra. Adjustable straps.
2. Step 2. Bra — is made of — Silk. Mary Phelps Jacob’s bra was made of silk handkerchiefs.
3. Step 3. Silk — works like — Nylon. Nylon was created as a substitute for silk.
4. Step 4. Nylon — is material for — Airbag. The airbag is nylon.
5. Step 5. Airbag — has part — Accelerometer. The crash sensor is an accelerometer.
6. Step 6. Accelerometer — is part of — Smartphone. The accelerometer rotates the screen.

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