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题目： 简答题某施工双代号网络进度计划如下图所示，其中A、B、D工作使用同一种施工机械，开工前有一台施工机械出现故障，导致可使用的该机械只有一台，根据现场施工条件，工作顺序调整为B、A、D，设备租赁费2000元/天。
由于业主的原因，工作E比原计划延长5天，工作G比原计划延长2天。由于承包商原因，工作K比原计划延长10天，该设备共闲置多少天？
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