| |||
main duct | |||
main line | |||
main pipeline; trunk pipeline | |||
lead pipe | |||
main pipe line; principal pipe; trunk duct | |||
main header | |||
main pipe |
主 管道 : 35 phrases in 10 subjects |
Electronics | 5 |
Engineering geology | 1 |
General | 1 |
Racing and motorsport | 1 |
Securities | 2 |
Sports | 1 |
Surgery | 2 |
Technology | 19 |
Telecommunications | 1 |
United Nations | 2 |