- welded steel gas cylinders
- 钢质: steel; steely
- 焊接: weld; welding; soldering; se ...
- 气瓶: air bottle; gas cylinder
- 丙烷钢质焊接气瓶: welded steel cylinders for liquefied propylene and propane gases
- 钢质焊接气瓶定期检验与评定: periodic inspection and evaluation of welded steel gas cylinders
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