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检孔镜
 检孔镜
met. boroscope
| 目视检查
 目视检查
dril. visual examination
met. hand inspection
nautic. tech. visual check; visual indication
nucl.pow. visual inspection
space visual check
tech. sight check; visual test
telecom. eyeballing

to phrases
检孔镜
met. boroscope
检孔镜
: 7 phrases in 3 subjects
Engineering geology1
Metallurgy4
Technology2