外壳直径 meaning in English

diameter of shell

Protective caps for pressure gauges with case diameter 63 mm used in welding , cutting and allied processes
用于焊接切割和相关工艺的外壳直径为63mm的压力测
Energetic materials for defense . safety , vulnerability . technical data document of the diameter 160 mm gun propellant generic hardware with an inflammable case
国防用高能材料.安全性,易损性.带可燃外壳直径160mm机枪的推进机件的技术数据文献