• 1. rectangular tube: 长方通 | 方通 | 矩形断面管 | 矩形管
• 2. FRP rectangular tube: 玻璃钢矩形管
• 3. 20 steel seamless rectangular tube: 钢无缝矩形管

更多释义

• 1.The utility model relates to a rectangular tube lead-acid accumulator.
  一种方矩形管式铅酸蓄电池。
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• 2.Features: the lifting mechanism adopts high strength manganese steel rectangular tube production.
  特点：举升机构采用高强度锰钢钜形管制作。
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• 3.Aiming at the deficiency of rectangular tube drawing process, the forming process was optimized from two aspects.
  针对矩形管拉拔成形中出现的不足，本文从两个方面对矩形管拉拔成形过程进行优化。
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