![]() |
观察 孔 | |
met. | glory-hole |
观察孔 | |
met. | eye hole; eye-sight; observation opening; observation port; observation window; peep |
therm.energ. | inspection hole |
护板 | |
cables | lagging |
观察孔 : 34 phrases in 11 subjects |
Automobiles | 3 |
Compressors | 1 |
Drilling | 1 |
Electronics | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 2 |
Metallurgy | 7 |
Oil / petroleum | 2 |
Space | 1 |
Technology | 14 |
Textile industry | 1 |