?自流式溢流堰

... weir with a free fall ==> 自由溢流堰 weir with free fall ==> 自流式溢流堰 Weir''s operation ==> 韦尔氏手术,阑尾造口术 ...

?自同溢流堰

... 自流溢流堰 free fall weir 自同溢流堰 weir with free fall 自由溢流堰 free fall weir; free weir; uncontrolled weir; weir with a free fall ...