Helicoidal-Ramp Type Drop Shaft to Deal with High Head Drop Works in Manholes

Author: Tamura Shiro   Matsushima Osamu   Yoshikawa Shizuo  

Publisher: Water Environment Federation

ISSN: 1938-6478

Source: Proceedings of the Water Environment Federation, Vol.2010, Iss.12, 2010-01, pp. : 4991-5002

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Abstract