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There’s a reason optical equipment uses cast iron, steel, and brass…
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A mid-stream perch provided a better vantage point
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I cracked the old one open to see what’s inside
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One interation as a bird would be edifying
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Being a sucker for noise sources
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The trench across the middle of the thicker part provides a wider compression adjustment range
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All my errors and omissions cancelled out enough to produce some interesting results on that historic paper
