| 摘要 |
The sprayer is for use in a garden or greenhouse, having a multi-section plastics housing with inlet union for a feed pipe and an outlet discharging to a spray pattern. A valve between them has a plug moved by the pressure of the liq. into the open position against spring action. - The plug has a first surface and a larger second one, exposed to the pressure of the liquid in the shut and open positions. The surfaces can be annular and coaxial.
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