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2Signification: peakheight summit top zenithapex acme apogee pinnacle
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3Signification: circlecircumvention ring circuit apogeeround orbit ellipse
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4Signification: endedge border extremity buttboundary last bounds apogee
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5Signification: apexzenith culmination extremity peakclimax acme apogee meridian
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6Signification: shapecircle circumvention ring circuitapogee round ellipse orbit