Updated to my second notebook, updated one after another ~ thank you for your support, exchange and learn from each other ~ business is prohibited without permission! Copyright: Teng Yilin.
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What kind of book is this?
Pay attention to the bosses and don't get lost.
In the second picture, there is no distinction between the turning point of the light and dark relationship of the T-shaped product, and it is not clear what the turning point of that part is like.