波多野结无码高清中文丨97插插插丨精品国产aⅴ无码一区二区丨av解说在线观看丨午夜精品久久久久久久喷水丨成人欧美一区二区三区黑人一丨日本免费一区二区三区在线播放丨浴室人妻的情欲hd三级国产丨成人学院中文字幕丨免费国产高清毛不卡片基地丨亚洲精品网址丨日韩视频福利丨欧美在线激情丨玖玖伊人丨av不卡在线免费观看丨欧美国产一二三区丨欧美精品久久久久久久自慰丨国产精品一国产精品一k频道丨国内精品自线在拍丨亚洲自偷自拍另类12p

The reasons for the poor performance of piston rods may include the following aspects:
1. Wear or damage
Due to the high load and wear that the piston rod bears during operation, it may experience wear or damage after long-term use, resulting in poor performance.
2. Corrosion
If its surface is not subjected to appropriate anti-corrosion treatment, or if there are corrosive media in the operating environment, it may corrode, leading to poor performance.
3. Fatigue
Due to its frequent reciprocating motion during operation, fatigue may occur after long-term use, leading to poor performance.
4. Installation issues
If the piston rod is installed incorrectly or without paying attention to some details during installation, such as not applying sufficient lubricating oil, it may also lead to poor performance.
5. Material quality issues
If its material quality is not up to standard or there are quality issues, it may also lead to poor performance.