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开关头
oil
switch-knob
tech.
valve head
开 关 头
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76 phrases
in 16 subjects
Architecture
5
Aviation
2
Compressors
1
Electric machinery
3
Electric traction
1
Electricity
1
Electronics
17
Exhibitions
1
General
1
Metallurgy
4
Nuclear and fusion power
1
Shipbuilding
3
Steel production
1
Technology
30
Telecommunications
1
Wind Energy
4
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