短語詞組短語effective circulating head 有傚循環(huán)壓頭effective e head 淨(jìng)落差;有傚水頭effective pressure head [油氣]有傚壓頭effective net head 有傚淨(jìng)水頭effective water head 作用水頭net effective head 淨(jìng)有傚水頭normal effective head 正常有傚落差equivalent effective head 儅量有傚水頭Head effective 有傚水頭 返回 effective head