The high-speed multicycle impact and speed, load fluctuant characteristics is a key factor that has influence on resistance to wear and resistance to multicycle impact for automotive engine chain.

汽车发动机链条的高速多冲特性以及速度与载荷的交变特性，是影响其耐磨性能和多冲抗力的关键因素。

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Small frontal area and high stability reduce the wind resistance effectively and load of lamp pole, which is advantaged for going against the wind, make it safe and reliable.

产品迎风面积小，稳定性高，有效降低了风阻，减轻灯杆的负荷，有利于抗风，安全可靠。

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When pile length and the ratio about pile length to pile diameter is less than 25, side resistance is aggrandized by increasing of the load, and gently added at high stress level.

对于桩长和桩的长径比均小于25的嵌岩桩，侧阻力随桩顶荷载的增加而增大，且在高的应力水平下平缓增长，当达到最大荷载时达到试验最大值，其嵌岩部分侧阻力从上至下依次发挥。

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