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表面接触
oil	surface contact
wind.	surface conduct

表 面接触: 42 phrases in 16 subjects

Agriculture	1
Automobiles	6
Aviation	2
Ecology	1
Electric machinery	1
Electronics	3
Engineering geology	1
Explosives and Explosive Ordnance Disposal	1
General	1
Metallurgy	3
Nuclear physics	1
Oil / petroleum	2
Pest control	2
Risk Management	2
Space	3
Technology	12