With the coming of knowledge economy the ageing period of technology and the speed of the people's occupational change become more quickly than before.
在即将来临的知识经济时代，技术老化的周期及人们职业变换的进度将越来越快。
This article expounds the test and application of new technology of vibration ageing to the welded workpiece of electric locomotive.
本文阐述振动时效新工艺在机车焊接件上的试验和应用。
The backward irrigation technology and management are also belong to irrigation district ageing. This view is first presented in irrigation ageing evaluation. The concept of evaluation based on irri…
首次提出灌区的灌溉技术和管理技术落后也属于灌区老化的范畴，并提出按灌溉面积和建筑物级别进行评估的概念。
The backward irrigation technology and management are also belong to irrigation district ageing. This view is first presented in irrigation ageing evaluation. The concept of evaluation based on irri…
首次提出灌区的灌溉技术和管理技术落后也属于灌区老化的范畴，并提出按灌溉面积和建筑物级别进行评估的概念。
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