"渣古"（ZAKU）是日本動畫"機動戰士高達"中出現的一個虛構兵器系列。它是高達世界中的主力兵器"機動戰士"(Mobile Suit, MS) 的一種。
渣古I - 史上最初被量產的MS、跟渣古II做區別而被稱為「舊渣古」。開戰當初曾經活躍過，但是從改良了缺點的渣古II被實戰配備之後就從前線退下，擔任補給及後方的任務。
渣古II - 作為自護公國軍之主力機體、具有凌駕舊式兵器的戰鬥力及運用性。以包括渣古機槍等多樣化的武裝投入各種任務。還有陸戰型等、相當豐富的衍生機型，據說是整個一年戰爭中生產數量最多的MS。
"Zaku" is a fictional weapon series appeared in the Japanese Animation "Mobile Suit Gundam". It is one of the main weapons "Mobile Suit" (MS) in the Gundam world.
Zaku I - The first mass production mobile suit in history was also known as the "Old Zaku" to distinguish it from the Zaku II. Although it was still in service as the war began, it was withdrawn from the front lines with the deployment of the Zaku II that fixed its shortcomings, and was relegated to supply and rear support duties.
Zaku II - The machine which served as the Principality of Zeon's main weapon. Its fighting strength and functionality surpassed those of previous weapons. With the Zaku machine gun and the rest of its varied arsenal, it could carry out any mission. There were also many variations, including ground types, and it is said that it was produced in greater numbers than any other mobile suit of the One Year War.
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