HTRI小问题? 表最下面有注解的~ + Frequency ratios are based upon lowest natural or acoustic frequency * Items with asterisk exceed a conservative lower limit for vibration-free design. Review your case using the procedure described in Online Help; You may find that a vibration problem is unlikely. 带星号的项应该说很有可能会使管束产生振动,需要进行相应调整~查看更多10个回答 . 1人已关注