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边孔 biānkǒngstresses
el. крайний пролёт; пролёт устоя
mining. отбойный шпур
tech. боковое отверстие
边 孔
: 54 phrases in 16 subjects
Antennas and waveguides2
Astronomy1
Automated equipment1
Computers1
Electronics3
General10
Geology3
Information technology3
Medical2
Metallurgy2
Military1
Mining2
Nautical1
Oil processing plants2
Skydiving2
Technology18