题44图13 1 2 3 4 5 6 A B C D 1 2 3 4 5 6 D C B A Title Size Number Revision B Date: 3-Mar-2002 Sheet of File: E:\Design Explorer 99 SE\Library\YangHengXin\MyDesign.ddb Drawn By: & & & D B C A F & 题4.4 图