Electric circuit-breakers
notation: TK2842
type: Concept

Electric relays
member: collection LCSH General
member: collection LCSHAuthorizedHeadings
broader: Electric circuit-breakers
broader: Electric switchgear
in scheme: lcsh
alternative label: Relays, Electric
created: 1986-02-11T00:00:00
type: Concept

Electric switchgear
notation: TK2821-TK2846
type: Concept