top 4 low investment high tech small machine & 4 business idea

all small machines bying links
Plastic Recycling Machine
https://www.fskbuilders.com/
Laser pecker machine
https://www.kickstarter.com/projects/...
Plastic Recycling Machine
https://www.etsy.com/uk/shop/
Books miking machine
https://spielassociates.com/perfect-b...
Slipper Making Machine
https://m.indiamart.com/impcat/footwe...
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