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保持器
met.	retainer
space	keeper
tech.	maintainer
保持器〔片〕
gen.	keeper
轴承保持器架
gen.	cage
保持定位，夹持器
auto.	retainer

保持器: 113 phrases in 26 subjects

Air defense	2
Automobiles	21
Aviation	3
Communications	1
Compressors	1
Construction	1
Dentistry	2
Drilling	1
Economy	1
Electric machinery	2
Electronics	16
General	4
Information technology	3
Mathematics	4
Metallurgy	1
Mining	1
Nursing	2
Otorhinolaryngology	2
Power system protection	1
Project management	1
Racing and motorsport	1
Rail transport	1
Space	5
Technology	32
Telecommunications	3
Transport	1