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通用合金弹簧钢是用途最广、最重要的弹簧材料。
The common alloy spring steels are the most important spring materials.
youdao
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所用的材料是不同等级弹簧钢。
The material used is Spring Steel of different grades.
youdao
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所用的材料是不同等级弹簧钢。
The material used is Spring Steel of different grades.
youdao