| 摘要 |
FIELD: nuclear, paper making, oil gas, food and chemical industries. ^ SUBSTANCE: proposed sealing cord is made of square cross-section packing formed from separate twisted braids and tape of porous polytetrafluorethylene coiled to spiral on above-indicated packing. The of porous polytetrafluorethylene is wound with tension in longitudinal direction, each following turn of spiral of polytetrafluorethylene tape partially overlaps preceding turn of spiral. ^ EFFECT: improved reliability of sealing cord. ^ 8 cl, 4 dwg |
