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【Daily Question】Utilities - Mechanical & Electrical - 20190903

2019-09-03View Original

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The \"Safety Specifications for Elevator Installation and Maintenance\" stipulate that during elevator installation, the ends of the scaffolding planks should extend more than () mm beyond the crossbars of the scaffolding. A. 50; B. 100; C. 150; D. 200. Answer: C

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