10 innovations containing 'handle'
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- achieve opposite functions simultaneously (1)
- add a new function or integrate another function (1)
- create a nested effect (1)
- enable a part to be removed and function on its own (1)
- increase filtering ability (1)
- increase user convenience (1)
- make environmentally friendly (1)
- make it easier to carry (1)
- make it easier to operate (1)
- make the ideal NO (1)
