An acoustically absorbent material (e. g. a fabric) may be secured to an inwardly facing surface of any part formed from perforated sheet metal.
吸音材料(例如织物)可固定至由穿孔金属板形成的任何部分的面向内的表面。
The door and parts of the fixed part may be made of perforated sheet metal.
门和固定部分的多个部分可由穿孔金属板制成。
The door and parts of the fixed part may be made of perforated sheet metal.
门和固定部分的多个部分可由穿孔金属板制成。
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