closed-feed system

• 闭式给水系统,闭式馈给系统

closed-feed system的用法和样例：

例句

1. Paraboloidal reflector antennas with an arbitrarily-defocused feed are investigated.And some interesting phenomena are observed.
   摘要吾人探讨任意离焦式馈人器之抛物反射天线并观察了一些有趣的现象。