| 1. | The rail beds well on the ballast .
铁轨在道碴上搁得很稳。 |
| 2. | The rails of the two tracks are supported on wooden ties resting on a ballast .
两条线路的钢轨放置在有道碴承托的枕木上。 |
| 3. | General technical specification for little ballast cleaning machine
小型道碴清筛机通用技术条件 |
| 4. | Ballast or pebble pitch forks 9 teeth
道碴和砾石的叉子九个齿 |
| 5. | Coarse gravel or crushed rock laid to form a bed for roads or railroads
道碴用来铺公路或铁路路基的粗砂砾或碎石 |
| 6. | Raiway track construction and maintenance plant . ballast regulator . specifications
铁路建造和维护设备.道碴稳定器.规范 |
| 7. | Critical ballast resistance
临界道碴电阻 |
| 8. | Railway track construction and maintenance plant . ballast cleaning machine . specifications
铁路建造和维护设备.道碴清理机.规范 |
| 9. | Ballast channel plate
道碴槽板 |
| 10. | Railway fixed equipment . ballast and gravel for shovel - packing . characteristics and specifications
铁路固定设备.道碴和砾石细料.特性和规范 |
