久久丫精品久久丫_妖精色AV无码国产在线看_少妇中文字幕乱码亚洲影视_中文字幕AV一区中文字幕天堂

Your location: -En-News-

Service Hotline

+86-15092504545

Maintenance of drill bits

Author:山東精鉆精密機械有限公司 Source:http://www.qivvc.com Time:2021-05-07
  Maintenance of drill bits
  
  1. When drilling steel parts, please ensure sufficient cooling and use metal cutting fluid.
  
  2. Good drill pipe rigidity and rail clearance can improve the accuracy of drilling and the life of the drill.
  
  3. Please ensure that the magnetic base and the workpiece are level and clean.
  
  4. When drilling thin plates, reinforce the workpiece, and when drilling large workpieces, please ensure the stability of the workpiece.
  
  5. At the beginning and end of drilling, the feed rate should be reduced by 1/3.
  
  6. For materials with a large amount of fine powder during drilling, such as cast iron, cast copper, etc., no coolant can be used, and 7. compressed air is used to help chip removal.
  
  8. Please remove the iron filings wound on the drill body in time to ensure smooth chip removal.
Next 沒有了

天天弄亚洲熟妇精品 | 高清人妻互换中文字幕 | 小向美奈子乳巨码无在线水澄 | 日本裸体熟妇一区二区 | 少妇又色又紧又爽又刺激视频 | 人人妻人人澡人人爽国产 | 国产在线观看无码免费视频 | DVD人人人澡人人人爽 | 操丝袜美女国产精品 | 特黄一级A片色情免费网站 樱桃视频极品尤物免费观看 | 午夜福利一二三区 | 17c人妻无码一区二区三区 | 日韩精品影视红桃视频 | 国产又粗又长又黄视频 | 91在线无码精品秘 蜜桃按摩 | 九一自拍视频在线观看 | 成人久久免费电影 | 91福利影视在线 | 天天爱天天操天天日 | 四虎国产精品免费在线观看 | 91精品无码青青草啪啪视频 | 亚洲中文字幕一区二区三区四区 | AV激情一区二区 | 影音先锋手机在线资源 | 噜噜WWWWXXXX无码| 中文字幕精品一区 | 国产Av鲁一鲁一鲁一鲁 | 无码人妻精品一区二区三区蜜桃视频 | AV簧片无码入口 | 日韩毛片在线免费观看 | 黄色视频免费网址 | 偷窥农村性XXXX生活 | 在线碰红桃视频观看 | 免费亲子乱婬一级A片 | 欧美视频亚洲天堂 | 2020无码人妻| 亚洲国产精品无码一区二区白鹿 | 国产在线精品一区二区不卡了阿恩 | 无码人妻丰满熟妇区毛片蜜桃精品 | 色色色欧美综合视频免费播放 | 国产亚洲免费看视频 |