船闸充泄水孔
/ˈlɒk ˈfɪlɪŋ and ˈɛmptiɪŋ ˈəʊpənɪŋ/
n
English: lock filling and emptying opening · 船闸充泄水孔
English · lock filling and emptying openingEspañol · abertura de llenado y vaciadoFrançais · pertuis de remplissage et de vidange
释义：Holes through which the water flows in to fill the lock-chamber or out to empty it.