Designed to meet exacting requirements of high pressure hydraulic or compressed air systems for aircraft, "Hardball" coupling is characterized by use of hollow ball of hardened steel as pipe nipple.
Headland pipe couplings
Automobile Engr
Automobile Engineer ; 45 , n 7
1955
Article (Journal)
English
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Beach Erosion Control Using Headland Breakwaters
British Library Conference Proceedings | 2001
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