heavy weight tubing
加厚油管
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端部加厚油管 upset tubing ; UPTBG
内加厚油管 tubing with internal upset ends ; internal upset tubing
外加厚油管螺纹 UPTBG
外加厚油管量规 UPTBG
外加厚油管接头 EU
不加厚油管接头 NU
不加厚油管 no thickened tubing
·2,447,543篇论文数据，部分数据来源于NoteExpress
月牙结构，相对传统的 特别加厚和直板技术，也更加富有弹性。弹性好的胶管螺旋保护套更有利于安 装在油管外面，且寿命更长。
The spiral protective sheath for the rubber tube with good elasticity is more in favor of being installed outside an oil pipe, and has longer service life.
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