Valverden.巴尔韦德(位于加那;西经 17º55' 北纬 27º48')
valven.瓣膜;真空管;阀门;电子管
valve outer spring阀外簧
valve of Vieussens维厄桑(氏)瓣, 前髓帆
valve action diode二极管的阀作用
valve helment mask活门头兜面具
valve for pipeline管道阀门
valve cover gasket阀盖垫密片
valve train system配气机构
valve rocker cover阀摇杆盖
valve-face width气门接触面宽度
valve push rod cup气门推杆球形上端