| 摘要 |
The cistern (2) has a flush valve assembly casing (1) open at the bottom and connected to the toilet flush pipe. Rectangular openings on opposite sides of the casing are connected by a box structure (7) allowing the surrounded water (4) to reach the two conical nesting valves (10,20). Each valve has a cone (12,22) and a valve seat (11,21), and are shaped and sized to allow the lower valve (10) to nest fully in the upper valve (20). The double valve assembly is controlled by a guide rod (15) attached to the valve (10) and slidable in the tubular rod (25) fixed to valve (22), and operated by knob (31). |
