It is the key component of interferometer, and its main parameters include focal length, field of view, wavelength range and so on. These parameters determine the resolution, detection sensitivity and
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Relief, also known as "convex carving", is a raised artistic image carved on a plane. According to the degree of surface convexity, relief is divided into high relief (high and low undulations, deep
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Bowel motions should be firm, moist, easy to pass and coloured brown. ... Children may feel stomach pain for a range of reasons and may need treatment...