支承结构包括铜和锌以及小于1％（重量）的铝、锡或铝与锡。

The support structure includes copper and zinc, and has less than 1 weight percent of aluminum, tin or aluminum and tin.

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支承结构包括铜和锌以及小于1％（重量）的铝、锡或铝与锡。

The support structure includes copper and zinc, and has less than 1 weight percent of aluminum, tin or aluminum and tin.

youdao