By theoretical analysing and calculating, we find the short needle valve fuel injector can further decrease the impact stress of the needle valve to the sealed conical surface.
经理论分析和计算发现，短针阀喷油器可以进一步降低针阀对密封座面的冲击应力。
The introduction of the magnetic field made the average crystallite size of needle coke decrease, graphite-based performances improve, density increase and transmittance reduce.
磁场的引入，使得针状焦的平均微晶尺寸降低、石墨化性能提高、致密度增大、透光率降低。
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