時空製造業
By: henshū Rōdōshō Shokugyō Anteikyoku
Series: Shokumu kaisetsu -- dai 84-shū
Publisher: Rōdōshō Shokugyō Anteikyoku
Published: 1950
Place of publication: Tokyo]
Language: jpn
Number of pages: 138
Subjects: Bearings (Machinery); Vocational qualifications
Other titles: Jiku-u seizōgyō
Notes: Cover title.