| |||
spiral chute | |||
spiral slot | |||
spiral groove | |||
helical groove; spiral flute; spiral scroll | |||
| |||
spiral flute | |||
| |||
helix |
螺旋槽 : 125 phrases in 12 subjects |
Agriculture | 1 |
Automobiles | 40 |
Drilling | 4 |
Electronics | 1 |
Explosives and Explosive Ordnance Disposal | 2 |
General | 2 |
Metallurgy | 6 |
Oil / petroleum | 3 |
Plastics | 4 |
Port facilities | 2 |
Shipbuilding | 2 |
Technology | 58 |