Meaning of 兜率都卒 in Japanese

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Definition of 兜率都卒

かぶと(kabuto) 【兜 ·冑 ·甲 ·胄】

(n) helmet (of armor, armour); headpiece
勝って兜の緒を締めよ。
You must keep up your guard even after a victory.

みやこ(miyako) 【都 ·京】

りつ(ritsu) 【率】

と(to) 【都】

(n, adj-no) metropolitan; municipal
「都庁舎でもらえますよ」と係員が付け加えた。
"You can get it at the courthouse," the clerk added.

そつ(sotsu) 【卒】