窗采用聚碳酸脂等材质，具备优良的耐老化性能，突出地耐受强紫外线照射的性能，与箱体材质具有同样的使用寿命。外观平整光亮，透明性应良好，表面无固化不良、透针孔、浸渍、裂伤及明显气汇;要能够从不同方位可清晰观察到箱内各元件接线和及时发现故障。

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7ix.com.cnsmooth and bright, transparency should be good, the surface should be free from poor curing, penetrating pinholes, impregnation, cracks and obvious air sink; it should be able to clearly observe the wiring of various components in the box from different directions and detect faults in time.