Kore de wakaru junkatsu gijutsu
Subtitle: motto tsukaō motto ikasō konna gijutsu
Series: Tokkyo mappu shirīzu -- 20
Publisher: Tokkyochō
Published: 2001
Place of publication: Tōkyō
Language: jpn
Number of pages: 288
Subjects: Patents
Other titles: Junkatsu gijutsu
Notes: Cover title.