| 摘要 |
The apparatus comprises an air line (2) a water line (11) and a mixing head (6), which provides a mist to suppress dust. A high pressure air supply, but a low pressure water supply are provided. A piston/cylinder assembly (24) has a water dispensing chamber (26') connected to a water reservoir (7). The piston is double-acting and is connected in the air supply. Air pressure on one side of the piston (25) dispenses water from the chamber and air pressure on the opposite side of the piston draws water into the chamber. <IMAGE> |
