厚内 meaning in Chinese

atsunai

The scraping coat technique for the thin layer propellant loading processing in mini inside radius solid rocket motor , precuring - bonding technique and secondary vacuum - pressure casting are developed and used to load the big slenderness ration ( 12 . 5 / 1 ) solid rocket motor with thin web , internal insertion radial concentric dual - layer propellant
探索出小口径薄层药刮涂成型工艺、预固化粘结技术,二次真空加压浇注，实施了大长细比（ 12 5 1 ）发动机薄肉厚内嵌式径向同心双层装药。