该穿孔珍珠岩吸声板包括珍珠岩板,其特征在于,所述珍珠岩板上设有凹陷。
The piercing perlite sound absorbing board comprises a perlite board, which is characterized in that a sag is arranged on the perlite board.
该穿孔珍珠岩吸声板包括珍珠岩板,其特征在于,所述珍珠岩板上设有凹陷。
The piercing perlite sound absorbing board comprises a perlite board, which is characterized in that a sag is arranged on the perlite board.
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