The device adopted a five-dummy-plate four-post framework and the five dummy plates' center through holes formed the center datum of the framework;
装置采用五隔板四柱式刚性机架，且五隔板的中心通孔形成了机架的中心基准；
The device adopted a five-dummy-plate four-post framework and the five dummy plates' center through holes formed the center datum of the framework;
装置采用五隔板四柱式刚性机架，且五隔板的中心通孔形成了机架的中心基准；
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