| 摘要 |
The irrigation device consists of a cylinder (1), which is closed from below and in whose lower section is the water inlet (6), and from a piston (2) which is slide fitted in the cylinder (1). Through the whole length of the piston (2) there is a channel ending above with a spray nozzle (15). Between the cylinder (1) and piston (2) there is a coiled spring (20) bear upwards against the cylinder (1) and downwards against the head (7) of the piston (2). The water pressure below the piston (2) lifts the piston (2) with nozzle (15) above ground level, which increase the range of the device and balancing of spraying.<IMAGE>
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