词汇	食道环
释义	食道环 esophageal ring
随便看	far-field angle far-field angular distribution of power far-field antenna range far-field approximation far field area farfield assumption far field body wave far-field body wave far field boundary condition far field cassegrainian antenna far-field cassegrainian antenna far field condition far-field condition Far-field condition far-field conditions far-field criterion far-field diffraction far field diffraction pattern far field directional diagram far-field displacement far field distribution far-field distribution far-field distribution model far-field distributions far-field divergence angle