He forgot to turn off the gas torch when he left.

他离开的时候忘记关掉气焊焊炬了。

youdao

Gas stop delay function, effectively protect the torch.

延时停气功能，有效地保护割炬。

youdao

Gas stop delay function, effectively protect the torch.

延时停气功能，有效地保护割炬。

youdao