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刀形开关 dāoxíngkāiguān
el.	bladed switch
met.	blade; contact breaker
oil	blade type switch
tech.	chopper switch; knife-blade switch; knife-edge switch; plug-in strip
telecom.	knife switch
刀形〔接触〕开关
el.	contact breaker

刀形开关: 5 phrases in 2 subjects

Electronics	3
Technology	2