GB 50041-2020 第6.1.5条
| **** | Gas piping in a gas boiler room shall be provided with vent pipes led to a safe outdoor location, and the vent pipe diameter shall not be less than DN50. |
| **** | Gas piping in a gas boiler room shall be provided with vent pipes led to a safe outdoor location, and the vent pipe diameter shall not be less than DN50. |
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