A few suggestions for gym equipment
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Especially for makers of gym equipment. :)
1. A more versatile power cage (like this: https://images-na.ssl-images-amazon.com/images/I/318A1BYM52L.jpg) instead of just a squat rack or Smith machine.
2. Abductor/adductor machine.
3. Cable curl machine (to allow "hero curls"/overhead curls, like these: )