| 摘要 |
The invention pertains to a spring balance system for sliding windows. The self-contained apparatus comprises a small diameter tube (11) and a larger diameter tube (12). The two tubes are telescopic with respect to one another. A spring (15) extends through the length of both tubes. There is a frictional engagement between the two tubes. At one end there is a means (17) for attaching the apparatus to a sliding window. The other end comprises a support (13).
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