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【单选题】
关于暗龙骨吊顶工程施工技术要点中下列叙述正确的是 ( ) 。
A.
石膏板的接缝应按其施工工艺标准进行板缝防裂处理安装双层石膏板时,面层板与基层板接缝可以在任意处,无须错开
B.
吊顶工程的木吊杆、木龙骨和木饰面板必须进行防火处理,并应符合有关设计防火规范的规定
C.
主龙骨起拱高度为房间短向跨度的 l ‰- 3 ‰,吊杆距主龙骨端部距离不得不小于 300mm ;当吊杆长度小于 1.5m 时,应设置反支撑
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