21 chain and washer pumps from the 1958 Peking Agricultural Exhibition /
Watt, S. B.(Simon B.)
Cheung, Paul Ying Sheung.
Intermediate Technology Development Group.
London Intermediate Technology Publications Ltd
1976
Cover title: Chinese chain and washer pumps
'... translations [from the Chinese by Paul Y.S. Cheung] of material circulated at the ... Exhibition' - note
Pumping machinery.