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Mear's gas flow calculator. F | Science Museum Group Collection
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Mear's gas flow calculator. F | Science Museum Group Collection
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Mear's pipe flow calculator
Fearns Mears
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MEAR's Water Flow Technical Calculator Imperial w Instructions Pipe Ducts Sewers | #1887381302
M.H. Mear Fearns pipe flow calculator circular slide rule 1960 England Holland - Vintage Man Stuff
![Calculator [Pipe Flow calculator] - Museum of Transport and Technology, New Zealand](https://collection.motat.nz/records/images/xlarge/20269/309301e786bb0147372021d16e7c4217618a8af9.jpg "Calculator [Pipe Flow calculator] - Museum of Transport and Technology, New Zealand")
Calculator [Pipe Flow calculator] - Museum of Transport and Technology, New Zealand
Fearns Mears
