Excerpt from Spons' Dictionary of Engineering, Civil, Mechanical, Military, and Naval, Vol. 4: With Technical Terms in French, German, Italian, and Spanish
It will be noticed that each valve has, on its upper side, a short rod 9; this rod has several uses. It serves as a handle to turn the valve, or to take it out of its seat; but its chief use is, when the pump is working, to prevent the valve from rising out of the cylindrical aperture in which it moves.
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Seller: PBShop.store US, Wood Dale, IL, U.S.A.
HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9780266769576
Seller: PBShop.store UK, Fairford, GLOS, United Kingdom
HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9780266769576
Quantity: 15 available