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12" x 13.14" <strong>Johnson</strong> Clamp forsealing leaking spigot and socketcast iron pipe with lead jointsuitable for existing mains whichare subjected to movement.In these years...1945Vannevar Bushproposes hypertext.The atomic bombinvented.1946The microwaveoven invented byPercy Spencer.Margate CorporationWater UndertakingPhotograph showing theVictaulic A.R.P closer jointswith set screws. Also shortreducer connecting by-passpiping to the closer joint.