Take the fattest marking pen you have, scratch that out and replace it with atomic hydrogen.

用你最粗的笔把它划掉，再用氢原子代替它。

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If an acetylene cylinder receives a sharp or deep dent, the metal is gouged, or any other mechanical defect, circle the defect with a marking pen to alert the supplier of the defect.

如果乙炔钢瓶有尖锐或深的凹陷，金属被凿，或任何其它机械缺陷，用记号笔在缺陷处画个圆来警告供应商。

youdao

If an acetylene cylinder receives a sharp or deep dent, the metal is gouged, or any other mechanical defect, circle the defect with a marking pen to alert the supplier of the defect.

如果乙炔钢瓶有尖锐或深的凹陷，金属被凿，或任何其它机械缺陷，用记号笔在缺陷处画个圆来警告供应商。

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