| 摘要 |
PCT No. PCT/SE91/00019 Sec. 371 Date Jul. 16, 1992 Sec. 102(e) Date Jul. 16, 1992 PCT Filed Jan. 11, 1991 PCT Pub. No. WO91/11267 PCT Pub. Date Aug. 8, 1991.An arrangement for affecting the motions of gasborne, especially air-borne, particles at a movable device, (5,6) comprises an enclosure (12, 22) which encloses said device (5,6) and is connected to a means (16, 28) for supplying or discharging a gas, such as air, to and, respectively, from said enclosure in such an amount that a positive pressure or a negative pressure is maintained therein. Moreover, the enclosure (12, 22) is made of a flexible, gas-permeable material which provides a substantially laminar gas flow downstream of the enclosure and which does not generate particles. |
