| 摘要 |
PURPOSE: A spray is provided to reduce environmental contamination by preventing unnecessary compressive gas from being emitted to the air. CONSTITUTION: A spray is composed as follows. A space is formed on the rear surface of a head(1) so that an adjusting nut(2e) can be inserted. An opening and closing rod penetrates through the head. Screw threads are formed on the opening and closing rod. The adjusting nut adjusts the screw threads of the opening and closing rod. Rubber packings are inserted into the front and rear of the adjusting nut and cut off air.
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