And with the process of population aging was speed up in rural area. The fluctuating of mortality was influenced by demographic and non-demographic factors in common.

农村地区人口老化程度加快，人口因素与非人口因素共同影响死亡率的变化。

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The speed of full mould can be repeated accurately on the basis of given parameter values, and is not influenced by leaking in furnace and pressure fluctuating.

充型速度可以根据设定值精确重复再现，不受炉内泄漏和管路气压波动的影响。

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Experiments of over 900 hours matching diesel were done in factory, covering the speed governor's start, speed performance, speed stability, and speed fluctuating with back pressure.

简要介绍了它的系统结构、功能与工作原理，并对该调速器进行900余小时多工况配机试验，主要包括起动试验、调速性能试验、转速稳定性试验和耐背压波动试验。

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