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        Model:66-6
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 66mm, Height: 33.68mm, Steps: 4mm
        6. Light angle: 60°
        Model:66-8
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External: 66mm, Internal: 52.9mm, Height: 26.9mm, Steps: 4mm
        6. Light angle: 90 °
        Model:66-11
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External: 66mm, Internal: 57mm, Height: 21mm, Steps: 4mm
        6. Light angle: 120°
        Model:67-42
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 66.6mm, Height: 26.76mm, Steps: 3mm
        6. Light angle: 70°
        Model:68-1
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 67.9mm, Height: 12.3mm, Steps: 3.5mm
        6. Light angle: 110°
        Model:68-3
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 67.9mm, Height: 22.56mm, Steps: 3.5mm
        6.Light angle:100°
        Model:64-2
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 64mm, Height: 26.8mm, Steps: 3mm
        6. Light angle: 80°
        Model:64-19
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 64mm, Height: 25.49mm, Steps: 3mm
        6. Light angle: 80°
        Model:66-14
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 66mm, Height: 47.5mm, Steps: 4.0mm
        6. Light angle: 45°
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