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GB 7588-2003 第5.4.1条 Safety rules for the construction and installation of elevators

Shaft电梯工程

GB 7588-2003 第5.4.1条

| | Shaft ventilation: Ventilation openings shall be provided at the top of the shaft, with an area not less than 1% of the horizontal cross-sectional area of the shaft, and the ventilation openings shall lead directly to the outdoors. |

Other clauses of this standard

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