Main joist of suspended ceiling
吊顶主龙骨
Discussion on construction technology of lightgage steel joist gypsumlath ceiling
浅谈轻钢龙骨纸面石膏板吊顶的施工技术
Poles can be held in place by using threading to brace them against a ceiling joist.
钢柱可以用一个支架固定在一个有天花板得地方。
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