Low-placed axles must have a protective cover

Diwei zhi zhougangtou yao qu diao huo an shang fanghu zhao
低位置轴杠头要去掉或安上防护罩
Low-placed axles must have a protective cover
1954, April
Gongren chubanshe (工人出版社)
54x39 cm.
BG D25/310

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