定期检验 meaning in Chinese

periodic inspection
periodic survey
periodical check
periodical survey
regular inspect

Periodic inspection and evaluation of welded steel gas cylinders
钢质焊接气瓶定期检验与评定
Periodic inspection and evaluation of seamless steel gas cylinders
钢质无缝气瓶定期检验与评定
Some experience for inspection of medical oxygen vessel in service
医用氧舱定期检验的几点体会
Periodic inspection and evaluation of dissolved acetylene cylinders
溶解乙炔气瓶定期检验与评定
Periodic inspection and evaluation of dissolved acety lene cylinders
溶解乙炔气瓶定期检验与评定

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