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NO contact
abbr.
contact open in working position
(
MichaelBurov
)
;
N.O. contact
(
MichaelBurov
)
;
normally open contact
(
MichaelBurov
)
abbr., electr.eng.
circuit-closing contact
(
MichaelBurov
)
;
circuit closing contact
(
MichaelBurov
)
no contact
abbr., telecom.
normally closed contact
metrol.
Relay contacts that are open when the coil is not energised
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