Chang'an SC6721NG4 City buses
| Vehicle Number | SC6721NG4 | Brand | Chang'an |
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| Type | City buses | Total Mass | 8100 |
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| Kerb Weight | 5440,5640 | Fuel Type | CNG |
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| Emission Basis Standard | GB17691-2005 National IV, GB11340-2005, GB18285-2005 | Axis Number | 2 |
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| Wheelbase | 3300 | Axle load | 3500/4600 |
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| Number of spring leaves | 10/11 | Number of tires | six |
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| Tire Specifications | 7.50-16,7.50R16,8.25-16,8.25R16 | Approaching and Departure Angle | 14/13 |
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| Front and Rear Suspension | 1860/2056 | Front Track Width | 1854 |
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| Rear Track Width | 1600,1660 | Identification Code | LS4A6750 ××××××××× |
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| Vehicle Length | 7216 | Vehicle Width | 2310 |
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| Vehicle Height | 2910,3110 | Maximum Speed | sixty-nine |
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| Rated Passenger Capacity | 40/10-25,40/10-29,37/10-25,37/10-29 | Company Name | Hebei Chang'an Automobile Co., Ltd |
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| Enterprise Address | Dingqu Road, Dingzhou City, Hebei Province | Phone Number | 0312-2354679 |
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| Fax Number | (0312)2354047 | Postal Code | 073000 |
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| Chassis | SC6681DNG4 | Chassis 1 | SC6681DNG4 |
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| Engine | | Engine NO. | CC | Power | Engine-assembling Enterprise | | NQ100N4 | 3759 | 79 | Dongfeng Nanchong Automobile Co., Ltd | | NQ120N4 | 3759 | 92 | Dongfeng Nanchong Automobile Co., Ltd |
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