| Controlled drainage uses valves to open and close drainage pipes and structures to control the depth of the water table. |
| Many reclaimed cast iron radiators come without valves, therefore the correct ones have to be sourced, which can prove problematic. |
| A quick, qualitative analysis of valves during SEM work confirmed the presence of pyrite and the calcium phosphate composition of the carapace. |
| Two aborts, even a slow-speed abort, on a hot day can make these valves release tire pressure. |
| The valves are actuated via drag arms from twin, contra-rotating camshafts. |
| The aortic and mitral valves functioned normally, and the left atrial size was normal. |
