简约风电器设备散热装置线条元素

masterpiece, best quality, technical line art, engineering blueprint, clean vector lines, thick outline, thin inner lines, recessed LED downlight, 3/4 view, white cylindrical body, circular lens texture, black heat sink fins, spring clips, green power cord, white background, high contrast, precise proportions, product design, no shading, monochrome, black lines on white background