GB 50116-2013 第3.2.1条
| Transmission lines of the automatic fire alarm system shall be protected by metal conduits, flexible (metal) electrical conduits, rigid plastic conduits of Class B1 or above, or enclosed wireways.
| Transmission lines of the automatic fire alarm system shall be protected by metal conduits, flexible (metal) electrical conduits, rigid plastic conduits of Class B1 or above, or enclosed wireways.
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