UL 441-2010 标准详情
- 标准号:UL 441-2010
- 中文标题:排气孔
- 英文标题:standard for gas vents
- 标准类别:美国保险商实验室标准UL
- 发布日期:2010-03-05
1 SCOPE1.1 THESE REQUIREMENTS COVER TYPES B AND BW GAS VENTS AND TYPES B AND BW GAS VENT ROOF JACKS INTENDED FOR VENTING GAS APPLIANCES EQUIPPED WITH DRAFT HOODS TO BURN ONLY GAS. TYPE B VENTS ARE ALSO INTENDED FOR USE WITH OTHER CATEGORY I APPLIANCE
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