セメント製造業
By: [henshū Rōdōshō Shokugyō Anteikyoku]
Series: Shokumu kaisetsu -- dai 31-shū
Publisher: Rōdōshō Shokugyō Anteikyoku
Published: 1949
Place of publication: Tokyo]
Language: jpn
Number of pages: 125
Subjects: Cement industry workers; Job descriptions; Vocational qualifications
Other titles: Semento seizōgyō
Notes: Cover title.