| 摘要 |
The control tap (1) has a handwheel (4) that can be rotated in either direction, operating a valve (11) via a shaft with a regulating system in the form of two holes (109) of different sizes in the shaft and a third hole (25) in the body of the valve, linked to its outlet (5). The hand wheel operates in two stages - one in which it opens the valve and the other in which it regulates the outlet flow through the holes. |
