| |||
neck | |||
cannelure | |||
circumferential groove | |||
ring groove | |||
annular groove | |||
ring channel | |||
annular recess; rocking slot |
环形槽 : 28 phrases in 12 subjects |
Agriculture | 1 |
Air defense | 1 |
Automobiles | 5 |
Electronics | 3 |
Explosives and Explosive Ordnance Disposal | 2 |
Information technology | 1 |
Metallurgy | 3 |
Oil / petroleum | 1 |
Plastics | 3 |
Project management | 1 |
Space | 2 |
Technology | 5 |