different between hashtagkey vs poundsign

hashtagkey

hashtagkey From the web:

• what is hashtag on keyboard
• how to use hashtag on keyboard
• how to get hashtag on keyboard
• how do i do a hashtag on my keyboard

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poundsign

poundsign From the web:

• what is pound sign
• what does pound sign mean
• what is pound sign on phone
• what does pound sign look like
• what is pound sign on keyboard
• what does pound sign mean in texting
• what does pound sign mean in medical terms
• what is pound sign on american keyboard