这扇门的材料是什么合金? 這扇門的材料是什麼合金? 這扇門的材料是什麼合金?

What kind of alloy is this door made of?

Simplified
这扇门的材料是什么合金?
Traditional (Taiwan)
這扇門的材料是什麼合金?
Pinyin
Zhè shàn mén de cáiliào shì shénme héjīn?
Bopomofo
ㄓㄜˋ ㄕㄢˋ ㄇㄣˊ ˙ㄉㄜ ㄘㄞˊ ㄌㄧㄠˋ ㄕˋ ㄕㄣˊ ˙ㄇㄜ ㄏㄜˊ ㄐㄧㄣ?

Written with HSK 5 vocabulary, at CEFR level B2.

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