Usually there's free activity on the surface of metal because of electronic.

通常金属的表面由于电子可以自由的活动。

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This metal acts on water to set hydrogen free.

这种金属作用于水，就释放了氢气。

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This metal is free from rust.

这个金属不会生锈。

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Please feel free to inquire by the tray, the metal mold, and what.

热情欢迎垂询有关托盘，模具方面的任何有关信息。

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Please feel free to inquire by the tray, the metal mold, and what.

热情欢迎垂询有关托盘，模具方面的任何有关信息。

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