... Arc(弧形) Arc lower(下弧形) Arc Upper(上弧形) ...
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lower arc 下珥
lower tangent arc 下切弧
lower circumzenithal arc 下环天顶弧
arc lower
弧低
以上为机器翻译结果,长、整句建议使用 人工翻译 。
On top of their lower labour costs, the mini-mills' electric-arc furnaces are much cheaper to build than iron-ore blast furnaces.
ECONOMIST: Steel: Rust never sleeps | The
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