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                                                        1. ZT250-S upper plate decorative nut (chrome-plated) | 
                                
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                                                        2. ZT250-S upper connection gasket φ18.5×φ39×1 (chroming) | 
                                
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                                                        3. ZT310-R upper connecting board(home-made) | 
                                
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                                                        4. ZT310-X upper connecting plate after-sales assembly (titanium) | 
                                
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                                                        5. GB70.1  Hexagonal Socket M8×30 (color Zinc) | 
                                
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                                                        6. ZT310 main lock (electromagnetic drive/wire length 450) assembly | 
                                
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                                                        7. Non-standard bolt M6×25 (environmental color/10.9 grade) | 
                                
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                                                        8. GB93 φ8 (environmental color) | 
                                
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