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一份老外的机械密封培训PPT

  • 2026-10-25 03:34:11
一份老外的机械密封培训PPT

约翰克兰的机械密封培训PPT，内容不错，粉丝们看完后应该会有所获益。

☞来源：百度文库

-END-

版权说明：感谢每一位作者的辛苦付出与创作，向原作者致敬！除转载众多无法溯源的文章，我们均在文章中备注了来源。本号所刊发文章仅为学习交流之用，无商业用途，如转载涉及版权等问题，

往期精彩推荐：

6种标准件的画法，螺纹、键销、轴承、齿轮和弹簧等

机械设计实用计算之曲柄连杆机构

机械设计培训-第五讲-丝杠、齿轮、链带传动

常用材料力学性能一览表

设备开发设计禁忌

机械制图知识大全，都在这320页PPT里了

标准件和常用件知识总结

气动技术（十三）之气缸的选择

设备性能分析矩阵

本文来自网友投稿或网络内容，如有侵犯您的权益请联系我们删除，联系邮箱：wyl860211@qq.com 。

北大开设炒股课:炒股PPT迅速走红!

基本 文件 流程 错误 SQL 调试
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  1. CONNECT:[ UseTime:0.000625s ] mysql:host=172.18.0.4;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000881s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000408s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000322s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000560s ]
  6. SELECT * FROM `set` [ RunTime:0.000264s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000637s ]
  8. SELECT * FROM `article` WHERE `id` = 508837 LIMIT 1 [ RunTime:0.000399s ]
  9. UPDATE `article` SET `lasttime` = 1793929972 WHERE `id` = 508837 [ RunTime:0.001567s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000321s ]
  11. SELECT * FROM `article` WHERE `id` < 508837 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000509s ]
  12. SELECT * FROM `article` WHERE `id` > 508837 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000403s ]
  13. SELECT * FROM `article` WHERE `id` < 508837 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000599s ]
  14. SELECT * FROM `article` WHERE `id` < 508837 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000637s ]
  15. SELECT * FROM `article` WHERE `id` < 508837 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000700s ]
0.082765s