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从实践到认识
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     A Knowledge of the Theory of Practice
     实践论的认识
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     Knowledge conies from practice.
     认识始于实践
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     Understanding China: Social Science That Starts from Practice
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     Practice Speaks Louder Than Knowledge: From Kant To Mao Zedong
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Jor the production of narrow strip of less than 600 mm in width, a hot strip mill with a planetary mill as roughing mill and three to four 4-high mills as finishing mill was suggested. The features of the said mill are less in number of mill stands, lower in investment and easily operate. Hot strip mills of 750 and 450mm has been designed which can be used to produce strips of 1.25mm minimum thickness, up to 620 and 320mm in width and up to 6.5and3 tons in coil weight respectively. The planetary mill used is...

Jor the production of narrow strip of less than 600 mm in width, a hot strip mill with a planetary mill as roughing mill and three to four 4-high mills as finishing mill was suggested. The features of the said mill are less in number of mill stands, lower in investment and easily operate. Hot strip mills of 750 and 450mm has been designed which can be used to produce strips of 1.25mm minimum thickness, up to 620 and 320mm in width and up to 6.5and3 tons in coil weight respectively. The planetary mill used is of the clam type which we have developed and used successfully twice in a pilot plant. The important features of clam type planetary mill are: higher in mill rigidity, lower in weight simpler in synchronous mechanism of upper and lower planetary rolls. The feasibility of using this hind of hot strip mill to roll narraw strip has been discussed.

为了大力发展窄带钢的生产,提出了用行星轧机辅助的窄带钢连轧方案。这是一种用行星轧机作粗轧、用3~4架四辊轧机作精轧的新的连轧工艺。其特点是机架少,投资省、易于调整。本文提出了750及450毫米两种连轧机的设计方案,分别用来生产最大宽度为620及320毫米,最小厚度为1.25毫米,卷重3~6.5吨的窄带钢。其年产量分别为33~40万吨及15~18万吨。我们对行星轧机经历了三次从实践到认识的循环过程。我们所发展的新型钳式行星轧机具有刚度大,重量轻,同步准确可靠及能够长期正常运转等优点,把它用在这种连轧机前,可以便连轧机有较高的作业率及较好的工作性能。本文对这种连轧机设计方案的可行性进行了阐述。

 
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