Explore over 350 million pieces of art while connecting to fellow artists and art enthusiasts. De gb fr nl es it dk se fi pl gr ru respectively represent which national languages de German gb English fr French nl Dutch es Spanish it Italian dk Danish se Swedish fi Finnish pl Polish gr Greek ru Russian abbreviation of various languages: en English. Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism.
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The difference between pipe markings dn, de, φ, d, and d: dn refers to the nominal diameter of the pipe. Note: This is neither the outer diameter nor the inner diameter. It is the average of the outer diameter and the inner diameter, which is called the average inner diameter. For example: dn200~φ219×6 d generally refers to the inner diameter of the pipe. d concrete. Deviantart is where art and community thrive.
