main line
短语词组
- main breadth line 舯部最大宽度;船舶最大宽度线
- main spectral line 主谱线;主轴
- main telephone line 电话主线
- main -line railway 干线铁路
- electric main connection line 电气主接线
- Main Production Line 主要产品;主生产线
- main lighting line 照明干线
- main suspension line 主悬索 返回 main line