> 0.2 contour -Z0.2
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> 0.4 contour -Z0.4
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> 0.6 contour -Z0.6
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> 0.8 contour -Z0.8
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> 1 contour -Z1
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> 1.2 contour -Z1.2
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> 1.4 contour -Z1.4
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