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				| 1. | Trapezoidal weir has another popular name. What is it? | 
| A. | Cipolletti weir | 
| B. | Hagen Poiseuille’s weir | 
| C. | Reynold’s weir | 
| D. | Euler’s weir | 
| Answer» B. Hagen Poiseuille‚Äö√Ñ√∂‚àö√ë‚àö¬•s weir | |