装そう甲こう回かい収しゅう車しゃ

• 戦せん車しゃ

  戦車 is a tank (combat vehicle), while 装甲回収車 is a support vehicle for recovering tanks.

• 装そう甲こう車しゃ

  装甲車 is a general term for armored vehicles; 装甲回収車 is a specific type used for recovery operations.

Compound of 装甲 (armor), 回収 (recovery), and 車 (vehicle). A straightforward technical term.