| 摘要 |
At least one nozzle is provided for supplying a stream of air to tubular knitted textile material. A retaining device, including at least one guide roller, is provided for retaining an air bubble formed in the textile material by the air supplied thereto. Means for controlling the air supply comprises a probing device for measuring said air bubble which is separate from and is located ahead of said retaining device, and includes a feeler element in contact with the side of the air bubble which is remote from said nozzle.
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