| 摘要 |
336,105. Magnet-Werk Ges. Eisenach Spezialfabrik f³r -Elektromagnet- Apparate. Dec. 14, 1928, [Convention date]. Safety-valves. - A valve for permitting expansion on heating of fluid within a coil casing of an electromagnetic chuck, comprises a ball 19 retained in a seating of an outlet 18 by a spring 20, a protective covering 22 being attached.
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