| 摘要 |
The device consists of a body /1/ closed with covers /10, 11/. In the body, on central rod /6/, there is the first valve /4/ leaning against the first spring and the second valve /5/ leaning against the second valve /15/. In the space formed between the first and the second valve /4, 5/ on the central rod /6/ the third valve /19/ is slided. The valve falls into the inner recess of the cylindrical part of the first valve /4/. The fourth valve /20/ falls into the inner recess of the cylindrical part of the second valve /5/. Between the third and the fourth valve /19, 20/ on the central rod /6/ there is the third spring /22/ and in the cylindrical part of the first valve /4/ there is the first channel /16/ and in the cylindrical part of the second valve /5/ there is the second channel /17/. On the central rod /6/, between the first and the third valve /4, 19/ there is the first ring /7/ and between the second and the fourth valve /5, 20/ there is the second ring /9/.<IMAGE>
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