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How electric signals helpful now in days

How electric signals helpful now in days
asked 147k views
4 votes
How electric signals helpful now in days

asked
User LiamNeesonFan
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7.6k points

1 Answer

4 votes

Answer:

they help us know how to do things and know what is happing but they may not be very helpful for blind people

Step-by-step explanation:

answered
User InsatiableTraveller
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