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Old September 5, 2012, 03:31 AM   #1
Junior Member
Join Date: March 7, 2012
Posts: 4
Ball valves with twisting wing nuts loading system

Good morning
Last August 29, I published " unusual prototypes".
James K suggested it may be french.
I need your help again.
Who can help me to find any picture of these kind of loading system?.
Where can I find any web or any book specialized ?.
I want to know how old it is .
Thank you everybody and excuse me again.
helike1 is offline  
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