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closed bore | |||
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closed pore | |||
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closed pore | |||
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injected hole | |||
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blind hole |
封闭 孔: 29 phrases in 9 subjects |
Electric machinery | 1 |
Electronics | 1 |
Explosives and Explosive Ordnance Disposal | 4 |
Hydroelectric power stations | 2 |
Metallurgy | 1 |
Oil / petroleum | 6 |
Plastics | 1 |
Technology | 12 |
Wood processing | 1 |