quadrivalves造句

• As in many other HVDC facilities, quadrivalves ( serial connections of four valves forming a unit ) are used.
• Both converter stations of Bipole 2 and the Araraquara converter station of Bipole 1 use single-phase, two-winding converter transformers with the thyristor valves arranged in " double-valves ", but the Porto Velho Bipole 1 converter station used single-phase three-winding converter transformers ( because the river made the transport of larger transformers feasible than was the case at Araraquara ) and valves arranged in " quadrivalves ".