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1 Introduction
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2 Observational data
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3 The energy and particle outputs in emitting particles
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4 Processes of particle acceleration in the galactic ridge
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5 Number of accelerated particles
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6 Chemical composition of the accelerated particles
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7 Spatial distribution of the subrelativistic particles in the galaxy
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8 Bremsstrahlung X-ray emission from the ridge
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9 Proton bremsstrahlung origin of the ridge X-rays
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10 Electron bremsstrahlung origin of the ridge X-rays
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11 Ionization of the interstellar medium by subrelativistic particles
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12 Conclusions
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References
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