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relay protection
el.	继电保护装置
met.	★ 继电保护
oil	继电器保护装置

relay protection : 56 phrases in 13 subjects

Agriculture	5
Automobiles	1
Electric machinery	5
Electricity	2
Electronics	13
General	1
Hydroelectric power stations	13
Information technology	3
Metallurgy	1
Power electronics	1
Rail transport	2
Technology	8
Telecommunications	1