提出了杂物梯门电联设计装配不合理等问题，并对其进行了设计与改进。
The faults in the interlock design of sundries elevator and door are pointed out, and some suggestions are put forward to improve the design.
工作区域，过道，梯道和所有其它区域要保持没有杂物，设备和材料。
Work areas, passageways, stairways, and all other areas will be kept free of debris, equipment, and materials.
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