1. Scientific and reasonable profile structure design can meet users' requirements for large space opening;
2. Multi-channel sealing design effectively improves the waterproof shortboard with folding structure for many years;
3. Equipped with high-strength hardware accessories for the operation of the central shaft, the stability is longer;
4. Enhance the vision and get close to nature from zero distance.
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Name: Xinlu Li
Add：Yuanzhuang Economic and Technology Zone, Jinan, China