3D打印巨头3D SYSTEMS公司专利态势分析
刘艳丽
1,
2,
*
(
),何微
3
,吴鸣
1
Patent Trend Analysis for 3D SYSTEMS
Yanli Liu
1,
2,
*
(
),Wei He
3
,Ming Wu
1
图14.
选择性激光烧结技术专利主题聚类地图
.