#1=WORKPIECE('SIMPLEWORKPIECE',#2,0.010,$,$,$,(#57,#58,#59,#60));
#7=CLOSED_POCKET('POCKET1',#1,(#21,#22),#44,#65,#66,#67,$,$,(),$,#8,#68);
#8=PLANAR_POCKET_BOTTOM_CONDITION();
。。。。。。。。。。。。
#44=AXIS2_PLACEMENT_3D('POCKET1',#89,#90,#91);
。。。。。。。。。。。。。。
#65=TOLERANCED_LENGTH_MEASURE(30.000,$,0.300,0.300);
#66=TOLERANCED_LENGTH_MEASURE(1.000,$,0.100,0.000);
#67=TOLERANCED_LENGTH_MEASURE(10.000,$,$,$);
#68=POLYLINE('CONTOUR OF POCKET1',(#96,#97,#98,#99,#96));
。。。。。。。。。。。。。。
#89=CARTESIAN_POINT('POCKET1OCATION',(45.000,110.000,45.000));
#90=DIRECTION('AXIS',(0.000,0.000,1.000));
#91=DIRECTION('REF_DIRECTION',(0.000,-1.000,0.000));
#96=CARTESIAN_POINT('P1',(0.000,0.000,0.000));
#97=CARTESIAN_POINT('P2',(80.000,0.000,0.000));
#98=CARTESIAN_POINT('P3',(80.000,50.000,0.000));
#99=CARTESIAN_POINT('P4',(0.000,50.000,0.000));
txt文本如上，要提取#7POCKET的所有数据信息，包括#44及其中的#89，#90，#91和#65，#66等等中的数据信息，请大侠指点，谢谢！！

请高手详细点，最好有相关例子参考。谢谢！