| standard | optional | |||||
| Upholstery | FRP with backframe，PU foam with cushion | |||||
| Adhesive | Water-based adhesive | |||||
| Plywood | PP | |||||
| Frame | 19mm tube，thickness ≥1.5mm | 1. 12 mm solid tub 2. 25mm*2.0mm tube 3. 25mm tube，thickness≥1.5mm |
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| Writing tablet | 25mm tube,aluminum alloy in joint, 360° available | |||||
