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故障现象：一台ＰＭ－６显微照相机使用中出现快门装置松动并有一些黑色海绵碎屑，不能正常使用。故障分析：经检查发现，ＰＭ－６显微照相机的快门装置和显微镜接口间的一环形海绵老化腐烂，其两面贴附的硬纸板也老化变脆，快门装置与接口分离，不能照相。恢复功能需要做一替
Symptoms: a PM-6 microscope camera shutter device used loose and there are some black sponge debris, can not be used normally. Failure Analysis: The inspection found that, PM-6 microscope camera shutter device and microscope interface between a sponge aging rot, the two sides of the cardboard attached to the aging crisp, the shutter device and the interface separation, can not take pictures. Restoration needs to be done