control valve stand 调节阀阀座

magnet valve stand 电磁阀架

valve control stand 控阀台

fuel valve testing stand 喷油器试验台

Stand balance valve 臂架平衡阀

single valve test stand 单阀试验台

hammer stand valve gear 锤机阀动装置

Stand operating valve 臂架操作阀

valve local control stand 阀操纵台