| 摘要 |
In the process, the polyurethane foam speed is controlled by two switching-mechanisms. The first switch operates on one of the edges of the vat-former running in advance-direction. The second switch operates on the edges running laterally across the advance-direction of the vat-former. The switching-mechanisms are more partic. magnetically operated, by changes in their magnetic fields through the corresponding edges of the former. |
