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H01H50/18—Movable parts of magnetic circuits, e.g. armature
H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
FR788374D1934-07-091934-07-09
Improvements to circuit breakers
ExpiredFR788374A
(en)