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干货PPT:紧固件基础、生产工艺及检验

  • 2026-11-08 18:17:49
干货PPT:紧固件基础、生产工艺及检验

做机加工的，紧固件天天见，但真要问你螺纹配合等级、常用材料、工艺路线，未必答得上来。小编今天给大家找来一份PPT从“基础→工艺→检验”，一次性全讲清，干货直接拿走。

☞来源：智能紧固件及紧固工具

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48小时、几版PPT和一个一等奖:启序元在西安AI黑客松都干了什么?

基本 文件 流程 错误 SQL 调试
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  1. CONNECT:[ UseTime:0.000708s ] mysql:host=172.18.0.4;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000975s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000516s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000368s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000506s ]
  6. SELECT * FROM `set` [ RunTime:0.000254s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000604s ]
  8. SELECT * FROM `article` WHERE `id` = 560515 LIMIT 1 [ RunTime:0.000401s ]
  9. UPDATE `article` SET `lasttime` = 1794337938 WHERE `id` = 560515 [ RunTime:0.001472s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000340s ]
  11. SELECT * FROM `article` WHERE `id` < 560515 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000448s ]
  12. SELECT * FROM `article` WHERE `id` > 560515 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000421s ]
  13. SELECT * FROM `article` WHERE `id` < 560515 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000510s ]
  14. SELECT * FROM `article` WHERE `id` < 560515 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000593s ]
  15. SELECT * FROM `article` WHERE `id` < 560515 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000726s ]
0.092671s