在使用每个特定的DXF组代码时，您需要阅读文档并偶尔对现有实体进行实验-对于一个DXF组（例如62）来说是正确的，对于其他相同数据类型（例如370）来说可能不一定是正确的
在这种情况下，线宽由以下枚举控制：
- enum AcLineWeight;
- {
- acLnWt000 = 0,
- acLnWt005 = 5,
- acLnWt009 = 9,
- acLnWt013 = 13,
- acLnWt015 = 15,
- acLnWt018 = 18,
- acLnWt020 = 20,
- acLnWt025 = 25,
- acLnWt030 = 30,
- acLnWt035 = 35,
- acLnWt040 = 40,
- acLnWt050 = 50,
- acLnWt053 = 53,
- acLnWt060 = 60,
- acLnWt070 = 70,
- acLnWt080 = 80,
- acLnWt090 = 90,
- acLnWt100 = 100,
- acLnWt106 = 106,
- acLnWt120 = 120,
- acLnWt140 = 140,
- acLnWt158 = 158,
- acLnWt200 = 200,
- acLnWt211 = 211,
- acLnWtByLayer = -1,
- acLnWtByBlock = -2,
- acLnWtByLwDefault = -3
- };
| 
