HSK 7-9
钢铁
gāngtiě名形
steel
这座大桥使用国产钢铁。
Zhè zuò dà qiáo shǐ yòng guó chǎn gāng tiě.
This bridge uses domestically produced steel.
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Appears across levels (7-9) in the HSK 3.0 word list.