language
²úÆ·ÖÐÐÄ
²úƷϵÁÐ
NSRÁ¢Ê½³ö¿ÚÏûÒôÆ÷ÐÍÂÞ´ÄÕæ¿Õ±Ã/ÂÞ´Ä·ç»ú
ÂÞ´ÄÕæ¿Õ±Ãת×ÓÑ¡È¡Á˸üÏȽøµÄÐÍÏߣ¬ÆäÃæ»ýÀûÓÃϵÊý´ï0.53,ÈÝ»ýЧÄÜÔÚÉýѹ98kPaʱÌá¸ßÁË5%~8%£¬ÔëÒô½µÂäÁËÔ¼5dB£¨A£©¡£