认识到建立固体火箭发动机燃烧室X射线探伤像质计标准势在必行。

It was considered that the establishment of radiographic IQI standard for solid rocket motor chamber was necessary.

youdao

认识到建立固体火箭发动机燃烧室X射线探伤像质计标准势在必行。

It was considered that the establishment of radiographic IQI standard for solid rocket motor chamber was necessary.

youdao