对某电子管厂从事精细作业的72例女工与配对选取的72例对照进行了视疲劳及有关因素的调查分析。
Visual fatigue and relevant factors of 72 female workers engaged in delicate jobs and 72 paired controls were investigated.
1930年，位于新泽西州哈里森市的那间最初生产爱迪生灯泡的制造厂重组后，为通用的子公司——美国无线电公司生产电子管。
The Lamp Works factory in Harrison N.J. originally constructed for Edison's bulbs was repurposed in 1930 to manufacture radio tubes for GE subsidiary RCA.
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