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Question:

120mm light steel keel wall keel model is how much

120mm light steel keel wall keel model is how much

Answer:

Sound insulation cotton is not necessary, but the best place, brick wall at least 100, the other commonly used there are 200,240 specifications.
Light steel keel routine with 75 partition keel, plus 2 layer 12 thick gypsum board is nearly 100 thickness

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