Stainless Steel 304 - Water Treatment and Purification - Lenntech

Description of the type 304 stainless steel including material notes, applications, chemistry, alternative grades and properties ... Material Notes Type 304 stainless steel is a T 300 Series Stainless Steel austenitic. It has a minimum of 18% chromium and...

他們說這是理工科的終極夢想，你懂了嗎？

  數學、物理、化學不過關，看不懂  ...

那些年，我們一起看的ps搞笑圖片！！

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這次不止惡搞美女～～連動物都........神級PS惡搞動物圖片 毫無違和感

 是不是真的很強呢？...

每日趣圖大放送

是說..有的好像沒那麼有趣啊...