| 摘要 |
A tubular article comprises a double walled tube (1), preferably of an elastomeric material having a friction reducing means (4) between the two walls (23) of the double wall. The friction reducing means comprising a liquid containing dispersed particles, preferably solid particles, having an average particle size of about 0.1 to about 1000 microns. The liquid is preferably a low viscosity liquid and is preferably dimethyl siloxane. The particles are preferably of sodium stearate. |
