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1·At the same time, housing can not have cracks, loose, the seal should not have been prized, in the device, open the process, the lamp should not have loose phenomenon, minow.

同时外壳不能有裂缝、松动，封口处不该有被撬过的痕迹，在装置、拆开过程中，灯头不该有松动，歪头现象。