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valveless pulsejet无阀门脉动式空气喷气发动机valve seat grinder阀座磨床,磨气门座机,气门座研磨机valve of operculum盖瓣(介壳虫)valve timing angle气门定时角valve side winding阀侧绕组valve-lifter cam气门顶杆凸轮valve guide reamer阀导承铰刀valve rocker shaft阀摇臂轴valve-stem guide阀导杆valve-controller阀门控制器

1. Manifolds can be added to a control valve sealing device.
   可以给阀组加一个阀的密封控制装置。
2. The apparatus consists of a bulb of known volume and valve block or manifold.
   仪器由一个已知体积的球管和一个阀组或管网所组成。