Pàobīng hé zhuāngjiǎbīng shì lùjūn de zhǔyào bīngzhǒng.
Artillery and armored troops are the main branches of the army.
Tips
usage
Don't confuse 兵种 (bīngzhǒng) with 军种 (jūnzhǒng). 军种 is the top-level service (army, navy, air force); 兵种 is a branch within a service (infantry, artillery, armor within the army). 军种 > 兵种 in scope.
