| |||
control ling manhole | |||
hand hole | |||
accessing opening | |||
overhaul hatch | |||
access door; access hole | |||
manway; inspection hole | |||
access port | |||
control manhole; inlet manhole; maintenance manhole | |||
access; access opening; manhole | |||
| |||
access opening | |||
| |||
access fitting; access opening | |||
| |||
access opening | |||
| |||
manhole | |||
| |||
hand hole | |||
| |||
access slot | |||
| |||
service hole |
检 修 孔 : 13 phrases in 5 subjects |
Automobiles | 1 |
Electronics | 1 |
Engineering geology | 1 |
Hydroelectric power stations | 2 |
Technology | 8 |