The text on the aprons:
抓革命促生产 - Grasp revolution, increase production.
The slogans in the background:
破除资产阶级法权思想 - Destroy the Ideology of Bourgeois Right (a phrase coined by Zhang Chunqiao, one of the Gang of Four).
认真学习马克思主义巩固无产阶级专政 - Earnestly study Marxism to strengthen the dictatorship of the proletariat.
エ业学大庆 - In industry, learn from Daqing.
独立自主自力更生 - Self-determination, self-reliance.