qvod电影 快播电影 伦理电影 电影天堂
qvod电影 快播电影 伦理电影 电影天堂
qvod电影 快播电影 伦理电影 电影天堂
qvod电影 快播电影 伦理电影 电影天堂
qvod电影 快播电影 伦理电影 电影天堂
qvod电影 快播电影 伦理电影 电影天堂
qvod电影 快播电影 伦理电影 电影天堂
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新闻 -- Wear-resistant pipe, compared with the advantages of traditional channels -- Splendid precision of Qing Yun county casts Ltd.
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Wear-resistant pipe, compared with the advantages of traditional channels
【 Source： 】 【 Addtime：2010-02-01 】 【 Font：Big Middle Small 】
　　Wear-resistant pipe with the traditional steel pipe, wear-resistant alloy steel pipe, cast stone and steel pipes, steel rubber tubes, etc. to differ. Wear-resistant outer layer is a seamless steel pipe, the inner is corundum. Corundum layer hardness of up to HV1100-1400, the equivalent of cobalt tungsten carbide, wear resistance than carbon steel pipe for more than 20 times higher. Wear-resistant pipe abrasion resistance depends mainly on the inner alumina layer of a few millimeters thick, more than wear-resistant alloy steel pipe, cast stone pipes not only depend on composition and organization, but also depend on the thickness to wear already have a qualitative leap.
Addtime：2010-02-01　　Views：95
 
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