Images 一 3P

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一 3p. P1=p2. P1 p2 p3 p4. (2p-3)(2p+3)+(p-2). P1 p2 p3 p4 в теплосети.
P1=p2. P1 p2 p3 p4. (2p-3)(2p+3)+(p-2). P1 p2 p3 p4 в теплосети.

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