《Share My BF - BF Gets a Threesome Christmas Gift From His GF-快播av》

【Share My BF - BF Gets a Threesome Christmas Gift From His GF-快播av】

高频很容易被吸(xi)收(shou)掉,地毯、窗帘、多种软性材料(liao)都(dou)能吸收(shou)高频(pin),而低频因为(wei)声波太长,很难简单用(yong)吸音材(cai)料来吸收。低频陷阱(jing)的(de)作(zuo)用是围住(zhu)低(di)频(pin),利(li)用震动将低(di)音声能转化为热能来消除它(ta),好的