It has been developed for the improvement of the digital seismic station, and is an alternateproduction of the model JD-2 deep well seismometer.
它是为井下地震台的数字化改造而研制的，是JD - 2型地震仪的替代产品。
2
The full image of your production server can be copied over or migrated to the alternate cloud.
可以把生产服务器的完整映像复制或迁移到备用云。
3
Alternate distribution of auxiliary production cost is the key link of auxiliary production cost distribution teaching which is included in teaching of cost accounting. It's also a difficult point.