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        <id>Z1_point</id>
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        <id>%9</id>
        <out_vector>I_vector</out_vector>
        <in_origin>O_point</in_origin>
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        <id>%10</id>
        <out_vector>J_vector</out_vector>
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        <in_end>Y1_point</in_end>
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        <id>%11</id>
        <out_vector>K_vector</out_vector>
        <in_origin>O_point</in_origin>
        <in_end>Z1_point</in_end>
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        <id>%16</id>
        <y>1.000</y>
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        <optics>central_medium_lens</optics>
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        <id>%26</id>
        <out_quadric>%27</out_quadric>
        <in_point>%24</in_point>
        <in_center>%22</in_center>
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        <id>%27</id>
        <gstate>defined</gstate>
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        <curve_color1>green_yellow</curve_color1>
        <base_surface_thickness>quadric3_base_surface_thickness</base_surface_thickness>
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        <point_style>sphere_point_style</point_style>
        <point_size>very_large_point_size</point_size>
        <point_color>blue</point_color>
        <graphic_layers>default_layer</graphic_layers>
        <base_point_size>point3_base_point_size</base_point_size>
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        <id>%29</id>
        <position>(4,0.018696996886982478,0.45217846169444104)</position>
        <out_point>%28</out_point>
        <in_quadric>%27</in_quadric>
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        <point_color>blue</point_color>
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        <base_point_size>point3_base_point_size</base_point_size>
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        <position>(4,0.69358184042457127,-0.69350350125196003)</position>
        <out_point>%30</out_point>
        <in_quadric>%27</in_quadric>
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        <id>%32</id>
        <out_subplane>%33</out_subplane>
        <in_points>%28 %30 %34</in_points>
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        <id>%33</id>
        <gstate>defined</gstate>
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        <point_style>sphere_point_style</point_style>
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        <point_color>tomato</point_color>
        <graphic_layers>default_layer</graphic_layers>
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        <curve_color1>green</curve_color1>
        <base_surface_thickness>subplane3_base_surface_thickness</base_surface_thickness>
        <base_point_size>subplane3_base_point_size</base_point_size>
        <base_curve_radius>subplane3_base_curve_radius</base_curve_radius>
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        <id>%34</id>
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        <point_size>very_large_point_size</point_size>
        <point_color>blue</point_color>
        <graphic_layers>default_layer</graphic_layers>
        <base_point_size>point3_base_point_size</base_point_size>
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        <position>(0,0.7460430432151709,0.31521347509881081)</position>
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        <id>%36</id>
        <out_plane>%37</out_plane>
        <in_points>%30 %34 %28</in_points>
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        <id>%37</id>
        <gstate>defined</gstate>
        <value>(0.12448077906194198,0.032943563872445333,0.15034199478425628,-0.98021249831238366)</value>
        <surface_thickness>normal_surface_thickness</surface_thickness>
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        <surface_color1>green_yellow</surface_color1>
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        <curve_color1>white</curve_color1>
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        <gstate>defined</gstate>
        <value>(8.1487444053327369,0.85208687959745533,-0.41385863126437295,1)</value>
        <point_style>sphere_point_style</point_style>
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        <point_color>red</point_color>
        <graphic_layers>default_layer</graphic_layers>
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        <position>(0.88284819595845132,-0.0051629533649187528,0.46963007442609533)</position>
        <out_point>%38</out_point>
        <in_plane>%37</in_plane>
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        <id>%64</id>
        <out_line>%65</out_line>
        <in_point>%38</in_point>
        <in_plane>%37</in_plane>
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        <curve_color1>cornflower_blue</curve_color1>
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        <gstate>defined</gstate>
        <value>(10.705491599881889,1.5287243905774686,2.6740596504512211,1)</value>
        <point_style>sphere_point_style</point_style>
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        <point_color>lime</point_color>
        <graphic_layers>default_layer</graphic_layers>
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        <out_point>%66</out_point>
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        <id>%74</id>
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        <curve_color1>dim_gray</curve_color1>
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        <point_style>sphere_point_style</point_style>
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        <point_color>lime</point_color>
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        <position>(0.96185495796993459,0.014961701596551223,0.27315048474053827)</position>
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        <in_line>%91</in_line>
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        <id>%95</id>
        <gstate>defined</gstate>
        <graphic_layers>hidden_layer</graphic_layers>
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        <curve_color1>deep_pink</curve_color1>
        <base_curve_radius>conic3_base_curve_radius</base_curve_radius>
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        <id>%96</id>
        <out_subline>%97</out_subline>
        <in_points>%38 %92</in_points>
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        <id>%97</id>
        <gstate>defined</gstate>
        <value>(8.1487444053327369,0.85208687959745533,-0.41385863126437295,1)(9.1997645338830498,5.2964414933066362,-2.2579520590395079,1)</value>
        <point_style>sphere_point_style</point_style>
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        <point_color>tomato</point_color>
        <graphic_layers>default_layer</graphic_layers>
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        <curve_color1>brown</curve_color1>
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        <base_curve_radius>subline3_base_curve_radius</base_curve_radius>
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        <id>%98</id>
        <out_plane>%99</out_plane>
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        <in_line>%91</in_line>
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        <surface_color1>light_steel_blue</surface_color1>
        <graphic_layers>hidden_layer</graphic_layers>
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        <curve_color1>dim_gray</curve_color1>
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        <base_curve_radius>plane3_base_curve_radius</base_curve_radius>
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        <id>%100</id>
        <out_line>%101</out_line>
        <in_point>%38</in_point>
        <in_plane>%99</in_plane>
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        <curve_color1>cornflower_blue</curve_color1>
        <base_curve_radius>line3_base_curve_radius</base_curve_radius>
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        <point_color>lime</point_color>
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        <id>%103</id>
        <position>(-0.96234683153859013,0.27182453132054968)</position>
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        <id>%104</id>
        <out_subline>%105</out_subline>
        <in_points>%38 %102</in_points>
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<p><span style="font-weight:600">&#29031;&#30456;&#26426;&#27169;&#22411;</span><br />&#20316;&#32773; Adrian Oldknow - July 2006	a_oldknow@compuserve.com <br /><br />&#34013;&#33394;&#30340;&#28857;&#25511;&#21046;&#32511;&#33394;&#30340;&#29699;&#38754;,&#19977;&#35282;&#24418;&#21644;&#25918;&#32622;&#26700;&#23376;&#30340;&#24179;&#38754;.&#32511;&#33394;&#28857;&#25511;&#21046;&#31616;&#21333;&#26700;&#23376;&#30340;&#26041;&#21521;&#21644;&#23610;&#23544;&#22823;&#23567;.&#40644;&#39068;&#33394;&#30340;&#28857;&#25511;&#21046;&#26700;&#23376;&#22312;&#30446;&#26631;&#24179;&#38754;&#19978;&#30340;&#20301;&#32622;.&#32043;&#33394;&#28857;&#25511;&#21046;&#29031;&#30456;&#26426;&#36879;&#38236;&#30340;&#20301;&#32622;&#21644;&#26041;&#21521;.&#20809;&#32447;&#20174;&#26700;&#23376;&#30340;&#35282;&#19978;&#31359;&#36807;&#36879;&#38236;&#30340;&#38024;&#31354;&#25237;&#23556;&#21040;&#29031;&#30456;&#26426;&#30340;&#21518;&#32972;&#38754;.&#26700;&#23376;&#19978;&#30340;&#32447;&#27573;AB&#25237;&#24433;&#25104;&#32447;&#27573;A'B',&#30697;&#24418;&#30340;&#26700;&#38754;&#30340;&#24433;&#20687;&#26159;&#19968;&#20010;&#22810;&#36793;&#24418;.</p>
<p></p>
<p></p>
<p></p>
<p></p>
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</document>
