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Sailboat mast coupling
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Seed pulling apparatus having diagonal feed and gas doping
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Method and means of producing a large diameter single-crystal rod from a polycrystal bar
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Zone purification device
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Induction furnace
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Electrical connector
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Spark gap device
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Ultraviolet light apparatus
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Airplane hangar
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Apparatus for applying flux and the like
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Apparatus and method for applying solder
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Spark gap and circuit therefor
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Heating apparatus and supply therefor
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Method and apparatus for securing elements together
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Ignition system for oil burners and the like
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