張秋勤

Overview

Works:	3 works in 0 publications in 0 languages

Titles

快樂的發明家 = 青少年科技發明作品與研究案例 / by: 張秋勤 (Language materials, printed)

引你成為發明家 = 青少年科技發明技法與專利申請 / by: 張秋勤 (Language materials, printed)

Subjects

青少年發明