Objective to find out the condition of income in the community health service stations (CHSS) from 2000 to 2002.
目的了解全国城市社区卫生服务站2000 ~ 2002年的收入情况。
And pointing out three factors which influence the stress and service life, they are poling condition of pavement structure, the interface and the rigidity difference between layers.
指出路面结构支撑条件、界面条件和层间刚度差是影响路面结构受力与使用寿命的三要素。
The service condition of aluminium alloy casting dies are analysed in this paper. The test of vacuum heat treatment process by high pressure gas quenching for the dies have been carried out.
分析了大、中型铝合金压铸模的工作条件，进行了真空高压气冷热处理工艺的试验研究，选出了适宜的工艺参数，并应用于生产。
The service condition of aluminium alloy casting dies are analysed in this paper. The test of vacuum heat treatment process by high pressure gas quenching for the dies have been carried out.
分析了大、中型铝合金压铸模的工作条件，进行了真空高压气冷热处理工艺的试验研究，选出了适宜的工艺参数，并应用于生产。
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