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1.991H210/O46/4×2和991H210/N56/4×2 该两车型是重汽公司为了提高991车型的市场竞争能力,在原斯太尔991基础上自行开发的新车型。两车型都采用了斯太尔92系列的WD612·65发动机,该机在质量及性能指标上均优于原991车所用的WD615·00自然吸气式发动机,並采用了少片弹簧、Rockwell单级减速桥、轻型货廂等轻量化措施,降低了自质量,提高了车辆性能及载质量。这两个车型被称之为991H轻量化车型。重汽公司与斯太尔公司为此项目签订了500台WD612·65的发动机购
1.991H210 / O46 / 4 × 2 and 991H210 / N56 / 4 × 2 These two models are the new models developed by CNHTC on the basis of the original Steyr 991 in order to improve the market competitiveness of 991 models. Both models are using the Steyr 92 series WD612 · 65 engine, the aircraft in the quality and performance indicators are better than the original 991 WD615 · 00 naturally aspirated engine and uses a small piece of spring, Rockwell single Light-weight reduction measures such as a grade reduction bridge and a lightweight cargo box have reduced self-quality and improved vehicle performance and load capacity. These two models are called 991H lightweight models. Heavy truck company and Steyr company for this project signed 500 WD612 · 65 engine purchase