FIELD: pipe-line fixtures. SUBSTANCE: shut-off devices is fabricated in the form of flexible hose which one end is turned inside out and communicates with drive mechanism to form spaces filled with magnetic liquid and gas. Inner surfaces of these space house D.C. conductors or permanent magnets. EFFECT: enhanced shutting off efficiency. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| VALVING DEVICE | 1990 |
|
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|
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