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tu2

网络二号无氧铜

tu2

tu2

tu2

二号无氧铜

...量不大于0.003％，杂质总含量不大于0.03％；二号无氧铜(TU2)纯度达到99.95％，氧含量不大于0.003％，杂质总含量不大于…

1

Don't know is which scrappy put their black paint on the blue curtain in days , the heavens are not angry black pigment , by he tu2.

不知是哪个捣蛋鬼把自己的黑颜料涂在天蓝蓝的幕布上，天也不生气，由他涂黑颜料。

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