| 摘要 |
<p>The device has an air-tight, flexible film clamped in a sealing opening with the help of clamping frames (1). The frames exhibit telescopic bars (2) with an elastic sealing profile (3) and fin-like bars (4) placed at two side surfaces for sealing at smooth limiting surfaces (6) and grooved limiting surfaces, respectively. The telescopic bars are joined with the elastic sealing profiles at one of the clamping frames and with the fin-like bars at another clamping frame.</p> |
