优先权表示执行一个作业的紧急性或重要性。

Priority indicates the urgency or importance of execution of a job.

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针对装配线平衡问题(alb)，归纳装配作业的三种基本约束关系，并通过约束矩阵描述装配作业的约束与优先权关系。

Three basic restricted relationships of assembly tasks are presented for assembly Line Balancing (ALB). The restriction and priority of tasks are described according restricted matrix.

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