| 1. | The hydrometric pendulum is sometimes used to determine flow velocities in open channels .
测流速的摆锤有时用于确定明渠中的流速。 |
| 2. | A land drain is usually a pipe buried in farm land but it may also be an open channel .
农田的排水系统通常是埋在农田中的管子，但也可以是明渠。 |
| 3. | These meters find wide use in open channel measurement and are usually a type of weir or flume .
这些流量计在明渠测量中得到广泛地应用，通常是以水槽或堰的形式出现。 |
| 4. | General view of construction works near existing nullah
位于大明渠旁边的工程情况 |
| 5. | Numerical simulation of compound open channel flow
复式明渠水流运动的数值模拟 |
| 6. | Photo of copper concentration in the fo tan nullah tr17
火炭明渠tr17的铜含量图片 |
| 7. | Photo of chemical oxygen demand in the kai tak nullah
启德明渠kn4的化学需氧量图片 |
| 8. | 16 nullahs will be decked in 10 years 14 . 1 . 2005
政府于未来十年覆盖十六段明渠14 . 1 . 2005 |
| 9. | Water flow measurement in open channels using thin - wall weir
用薄壁堰测量明渠中水流量 |
| 10. | Photo of tin shui wai nullah , running alongside housing estates
图片毗邻屋的天水围明渠 |
