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AWWA M49   2025   Butterfly Valves: Torque, Head Loss, and Cavitation Analysis 40 $
AWWA M49   2017   Butterfly Valves: Torque, Head Loss, and Cavitation Analysis First Edition 40 $
AWWA M49   2012   Butterfly Valves: Torque, Head Loss, and Cavitation Analysis 40 $
AWWA M49   2001   Butterfly Valves: Torque, Head Loss, and Cavitation Analysis First Edition 25 $