求翻译：It has been proposed to use the characteristic tendency of an axially symmetric stream issuing from an annular conical nozzle to be focused under the influence of the Coanda effect in a cylindrical jet of circular cross-section [2]. Information is given in [3, 4] on the development of wide-range gap sensors based on th是什么意思？

待解决 悬赏分：1 - 离问题结束还有