4D：直径的4倍

“4 times the Diameter”在工程技术及制造业中常被简写为“4D”，这一缩写形式便于快速记录与交流，有效提升了工作效率。其对应的中文含义为“直径的4倍”，广泛应用于各类技术标准、设计图纸及生产工艺文件中。

4 times the Diameter具体释义

  • 英文缩写：4D
  • 英语全称：4 times the Diameter
  • 中文意思：直径的4倍
  • 中文拼音：zhí jìng de bèi
  • 相关领域： 4d 制造业

4 times the Diameter的英文发音

例句

  1. As a rule of thumb, the minimum device feature is about 4 times the beam diameter.
  2. 一般来说，最小器件图形大约是电子束直径的4倍(4D)。
  3. By this formula, the adequate anchorage length for bars with the diameters of 14 and 16 mm is worked out to be 3 times of the bar diameters, and 4 times for bars with the diameter of 18 mm.
  4. 运用该计算公式得出，直径为14和16mm钢筋的锚固长度适宜取3倍钢筋直径，直径为18mm钢筋的锚固长度适宜取4倍钢筋直径。
  5. The results show that the moisture diffusivity of frozen aluminum hydroxide sludge increases about 4 3 times as compared with unfrozen aluminum hydroxide sludge. That is caused by the increase in the diameter and porosity of sludge particles in the freezing process.
  6. 显然，冷冻后水分有效扩散系数比冷冻前大约增加了43倍，系由于冷冻使污泥粒子粗大化和多孔化所造成的结果。
  7. When the pollen tube extended to the stigma chord, and the length of the pollen tube was 4-10 times as the diameter of pollen, the generative cell split into two sperms.
  8. 在花粉管进入柱头沟时，管长为花粉直径的4～10倍期间，生殖细胞分裂形成两精细胞。
  9. The research results show that usually the critical open diameter of a hopper for dry particles is more than 3 times of particle diameter, but no less than 4 times for wet particles.
  10. 结果表明：对于干颗粒，满足不结拱的料仓开口度尺寸至少为颗粒直径的3倍，而湿颗粒则要求料仓开口度至少为颗粒直径的4倍(4D)；

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