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A boiler, refrigeration unit system operation work experience.
有锅炉、制冷机组系统运行工作经验。
youdao
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The Work Unit and Intergenerational Mobility: Is the work unit system declining?
单位与代际地位流动：单位制在衰落吗?。
youdao
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The Work Unit and Intergenerational Mobility: Is the work unit system declining?
单位与代际地位流动：单位制在衰落吗?。
youdao