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JAGUAR air compressor: a large-scale professional air compressor manufacturer from China, committed to providing energy-efficient air compressor. The leader of the permanent magnet screw air
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As one of the most professional spectral pure anhydrous ethanol manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy high-grade
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Equivalence relates the visual properties of photos from different formats based on the focal length and aperture of the lens. Neither the focal length nor the relative aperture of a lens change as a function of sensor (for example, a 50mm f/1.4 lens is a 50mm f/1.4 lens, regardless of the sensor behind the lens).