半圆凿
发表于 2025-3-28 14:40:02
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ITCH
发表于 2025-3-28 19:30:28
J. Daniel Menezes MD,Maria José Barbas MD,J. Goulão MDts with a spherical wave front. Therefore, as in an isotropic medium, the velocity of the wave is the same for all directions, and a beam which behaves in such a way is called the ordinary ray. The other wave creates wavelets with an elliptical wave front and is called the extraordinary ray. The vel
Asseverate
发表于 2025-3-29 01:24:39
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commune
发表于 2025-3-29 04:46:52
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Moderate
发表于 2025-3-29 10:42:06
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cochlea
发表于 2025-3-29 13:54:10
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