A.電壓 B.電荷 C.功率 D.積分
A.橢圓齒輪流量計(jì),轉(zhuǎn)子流量計(jì),渦輪流量計(jì) B.腰輪轉(zhuǎn)子流量計(jì),轉(zhuǎn)子流量計(jì),渦輪流量計(jì) C.橢圓齒輪流量計(jì),腰輪轉(zhuǎn)子流量計(jì),轉(zhuǎn)子流量計(jì) D.渦輪流量計(jì),橢圓齒輪流量計(jì),腰輪轉(zhuǎn)子流量計(jì)