The outer sleeve is attached to the inner sleeve by being deflected around annularridge at one end of the inner sleeve.
套装在第一个套管内的第二个套管,在第一个套管和第二个套管之间留出一段环形空间,用以容纳管子的端头;
2
The results demonstrated that the external morphological structure of gill rakes, the gill arches and the gill filaments showed the presence of various features such as annularridge and short lines.
结果表明:鳃耙、鳃弓、鳃丝上皮细胞表面都有环形隆嵴、断续的短纹;
3
The 'hot' dispersion equation of the coaxial ridge-disk-loaded cylindrical waveguide TWT with an annular electron beam can be firstly obtained according to self-consistent field theory.