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Peter R. McMahon's user avatar
Peter R. McMahon's user avatar
Peter R. McMahon's user avatar
Peter R. McMahon
  • Member for 5 years, 2 months
  • Last seen more than a month ago
  • Wollongong NSW, Australia
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391
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59k
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56
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2
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About

Retired electronics technician with an interest in physics, aerodynamics & chemistry.

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2
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7
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5
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7
Posts
12
Posts %
4
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12
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8
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14
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3
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5
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9
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