The function,structure and working principle of the automatic inspection instrument for devices hung under freight cars are described,and the application is prospected.
介绍了货车垂下品自动检测仪的功能、结构及工作原理,并展望了其应用前景。
The poorest families were excluded from the three grades, and were regarded as “the families below the low-grade”.
吴简中的普通民户按财产分为上品、中品和下品三个等级,而一些赤贫户则被划在这三个等级之外,称为“下品之下”。
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