Yui is trapped in the abandoned supply base, and the BETA have broken through the defense lines.  With no hope of escape, she attempts to destroy the prototype cannon to keep it from falling into the wrong hands...
You took it off for overauls, right?
Cuando le dabas mantenimiento al cañón 
tenías que abrirla, ¿no es así?
Cuando le dabas mantenimiento al cañón 
tenías que abrirla, ¿no es así?
Mas você o desmontou para manutenção, não?