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اندیشکده زنجیره تامین و لجستیک ایران Telegram News
6How to manage your Telegram channel? A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. Polls The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. Telegram channels fall into two types:
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