摩托车排气净化问题已成为我国摩托车行业要解决的重大课题之一。
The problem of purifying motorcycle exhaust has become one of the most important tasks for our motorcycle industry.
摩托车振动问题，是长期困扰我国摩托车制造企业产品性能和质量的瓶颈。
The vibration problem of the motorcycle puzzles our motorcycle manufacture enterprise for a long time.
由于我国摩托车工业大多采用日本的技术，国内对曲轴箱的强度、稳定性方面的研究很少。
Since most motorcycle technologies of our country are introduced from Japan, the researches on the intensity and stability of MCB in our country are few.
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