automatic fuel drain valve
automatic cylinder drain valve
drain valve
排放阀
排气阀
排泄阀
排出阀
排液阀
排污阀
排水阀
排流阀
放泄阀
放水阀
疏水阀
疏水门
spiral case drain valve
application valve cover
conjunctiveal valve cover
AFR fuel storage (away-from-reactor fuel storage)
array of fuel rods in the fuel assembly