khzz 发表于 2006-10-15 09:53:14

武钢3000mm中厚板轧钢机工作辊用长寿命轴承国家鉴定会总结

<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; LINE-HEIGHT: 30pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">武汉钢铁集团公司轧板厂</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">3000</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轧钢机是二重采用德国德马克公司技术,为武钢技术改造设计、制造的先进的四辊轧机。该机的支承辊采用油膜轴承,工作辊采用四列圆锥滚子轴承。因受主机设计空间的限制,二重选用了</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">3819/560</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">(</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">10779/560E</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">)四列圆锥滚子轴承,该轴承的外形尺寸为</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">d</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">×</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">D</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">×</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">B</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">(</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">T</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">)</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">=560</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">×</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">750</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">×</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">368</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。同时二重及武钢均提出了轴承设计水平应与国外先进水平相当,使用寿命要达到轧钢</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">30</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">万吨以上。为满足主机设计及使用要求,成都科华重型轴承有限公司(成都重型轴承研究所)采用了国内独创的<B style="mso-bidi-font-weight: normal">“滚动轴承极限设计方法”</B>对</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">3819/560E</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴承进行了设计计算,在尚留有设计储备前提下,加大了滚子直径及长度,使该轴承的额定动载荷达到</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">7100KN</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,额定静载荷达到</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">19200 KN</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。查阅</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">1995</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年洛轴所编写的全国滚动轴承产品样本,该轴承原有的额定动载荷为</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">4370 KN</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,额定静载荷为</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">13300 KN</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。两相比较,成都科华重轴公司轴承的额定动载荷是原有轴承的</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">1.6247</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">倍,额定寿命则是原有轴承的</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">5.04</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">倍。</SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴承主材采用了高可靠性和长寿命的电渣重熔钢:</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">G20Cr2Ni<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="4" UnitName="a">4A</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,确保大幅度提高轴承的使用寿命;在热加工方面采取了细化组织、减小热处理变形的有效措施,保证了轴承零件的金相组织及硬度的均匀,提高了轴承寿命;围绕多列轴承受力均匀的要求,在冷热加工的工艺、工装、检测及装配方面采取了一系列提高轴承寿命的有效措施,以保证达到轴承应有的使用寿命。</SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通过二年多来的使用证明,成都重型轴承研究所与武钢轧板厂共同研制开发的长寿命轴承取得了可喜成果,轴承的平均轧钢量己超过</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">50</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">万吨,已高于原中厚板轧机用轴承的轧钢量一倍以上,确属长寿命中厚板轧机轴承,超过了设计及使用单位对该轴承的预期要求,除二套轴承因故障损坏外,其余轴承仍在使用中。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; LINE-HEIGHT: 30pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="24" Month="8" Year="2001"><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">2001</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">8</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">月</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">24</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">日</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,国家经贸委委托四川省经贸委在湖北省武汉市主持召开了</SPAN><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="3000" UnitName="mm"><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">3000mm</FONT></SPAN></st1:chmetcnv><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中板轧机用长寿命轴承</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">3819/560</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">(</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">10779/560E</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">)新产品鉴定会。鉴定委员会审阅了由成都重型轴承研究所和武钢轧板厂联合向鉴定委员会提供的全套技术资料,听取了研制、使用、检测、标准化、工艺审查及查新等各项报告和质疑答辩,并对轴承的使用现场进行了实地考察和验证。鉴定委员会经过认真评审,形成鉴定意见如下:</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 30pt; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">1.</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">提供的技术资料清晰完整,数据准确可靠,符合国家产业技术政策和新产品鉴定要求。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 30pt; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">2.</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所研制的长寿命轴承设计先进(采用了独创的极限设计方法),选材精良(优质电渣重溶渗碳钢),加工工艺合理,轴承的设计制造综合技术水平达国内领先水平。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 30pt; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">3.</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">使用报告提供的数据表明,所研制的长寿命轴承自</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">1999</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年运行至今,平均轧钢量已达</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">50</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">万吨,超过了主机设计要求(轧钢量</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">30</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">万吨),也大大超过了国内同类轴承的平均使用寿命,达国内先进水平。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; LINE-HEIGHT: 30pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鉴定委员会一致同意通过鉴定。建议进一步加大推广应用范围,并推荐该产品申报国家级新产品。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; LINE-HEIGHT: 30pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">附注:</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">1.</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本项目已获</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">2002</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年度国家重点新产品证书。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; LINE-HEIGHT: 30pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>2.</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">该轴承最终的平均轧钢量已超过</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><FONT face="Times New Roman">70</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">万吨。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; LINE-HEIGHT: 30pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; tab-stops: 477.0pt 486.0pt"><SPAN lang=EN-US style="FONT-SIZE: 14pt; mso-bidi-font-size: 12.0pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>

天气 发表于 2006-10-15 10:04:40

Re: 武钢3000mm中厚板轧钢机工作辊用长寿命轴承国家鉴定会总结

轴承不一般,恭喜祖国制造业。。。
鉴定程序让我回忆起了在国企时的工作时光。。。

ssnail 发表于 2006-10-16 22:23:31

Re: 武钢3000mm中厚板轧钢机工作辊用长寿命轴承国家鉴定会总结

我国的圆锥还得好好向timken学习学习,美国的战斗机,航母啥的全部用的timken 的圆锥。但愿祖国强盛呐,呵呵。

长弓宏 发表于 2009-1-8 13:14:48

感觉像是人民日报上抄下来的
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