The sociologist Ruth Milkman of City University of New York found that many line workers, in their off-hours, did home renovation and other skilled work.

纽约城市大学的社会学家鲁思·米尔克曼发现，很多流水线工人在下班时间会进行房屋装修和其他技术工作。

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But that image is growing stale, according to Ruth Milkman, the director of UCLA's Institute of Industrial Relations.

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Undocumented workers in particular have long been considered "unorganizable, " according to Ruth Milkman, who heads UCLA's Institute for Research on Labor and Employment.

NPR: Labor Unions Now Recruiting Immigrant Workers