Cast iron is one of the most commonly used gear materials.

铸铁是最常用的齿轮材料之一。

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Then the powder metallurgy gear is compared with gear made of alloy cast iron.

并对合金铸铁机油泵驱动齿轮和粉末冶金机油泵驱动齿轮加以比较。

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Then the powder metallurgy gear is compared with gear made of alloy cast iron.

并对合金铸铁机油泵驱动齿轮和粉末冶金机油泵驱动齿轮加以比较。

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