double-breast
n.— «Double breasting, also known as “dual shop operations,” has become a common construction practice in which a company maintains separate affiliates, one union and one nonunion, in order to compete and respond to market conditions.…Opponents of anti-double breasting say it is not only anti-employer, it is anti-worker. The bill could force nonunion workers in the open shop companies of double-breasted organizations to join unions if they are in a non-RightTo-Work state.» —“Anti-Double-Breasting Tops Labor’s Agenda” by Mark A. de Bernardo Construction Products May 1, 1989. (source: Double-Tongued Dictionary)