doubler
n. 倍压器；加倍装置
例句
The ultimate strength of doubler plate is studied.
研究了加强版的极限强度。
There is also a doubler feature at no additional cost.
还有一个额外的功能，在没有成本加倍。
Treat others sincerely you can get times doubler get one's own back!
真心对待别人你会得到双倍的回报！
