local labor union; local labour union
A labor union organized at the level of a single workplace or enterprise, as opposed to an industrial or national union.
A local labor union has been organized at this factory.
General term for a labor union; 単位労働組合 specifically refers to a union at a single workplace or enterprise level.
Compound of 単位 (unit) + 労働 (labor) + 組合 (union), literally 'unit labor union'.