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Principal characteristics: 1. Read twice and recognize both sides of the form with once input. 2. With four photoelectric sensors. 3. Can read forms with track distance of 1/6". 4. Can read forms with *0 routes at most. Specifications: Reading mode: double-face and read two times Feeding mode: automatic Speed: **3pcs/sec (based on A4) Form size: **0mm**0mm***0mm***0mm Form thickness: *****0g/m2 Track distance: 4.*3mm Tolerance: cutting±0.2mm Marking tools: pencil read head: pencils and carbon penpen read head: pencils, pens, ball-point; pens (non-red, non-white) Size of mark: 2mm*1mm Error rate: 1****7 Double-sheet rate: 1****4 Check rate: 1****4 Mark choice: single choice, multiple choice and BCD code Format: *6 kinds, each has **6 commands at most Bar code: **8 code, *9 code and *5 code Communicate interface: RS**2 serial and USB interface Host: PC **6 or faster, notebook PC Weight: 8kg Operating system: Win***0 or Win XP Power supply: AC******0V, ****0Hz Packing size: **0mm***0mm***0mm Environment: temperature ***0°C, humidity *0%, no erosive gas