如果闻到煤气味儿，或看到管道破裂，要关掉从外面进屋煤气管道的主阀门。

If you smell gas or see a broken line, shut off the main valve from the outside.

youdao

如果闻到煤气味儿，或看到管道破裂，要关掉从外面进屋煤气管道的主阀门。

If you smell gas or see a broken line, shut off the main valve from the outside.

youdao