削弱磁场阀的英文：
field weakening valve

field是什么意思：
n. 原野，田地；运动场；领域，专业；实地，野外
adj. 实地的，野外的，野战的；野生的；田间的
v. 接球；巧妙回答

A rectangular field is to be subdivided into eight equal fields to sell.
这块矩形的土地被划分成八等分再出售。

Scatter seeds on the fields/scatter the fields with seeds
在田里播种[把种子撒在田地里]

They leveled a field yesterday.
他们昨天平整场地了。

weakening是什么意思：
v. 使虚弱，使衰弱；削弱，减弱；畏缩，动摇

Ministerial resolve has weakened noticeably.
部长决议明显缓和。

The outflow weakens the dollar.
资金外流削弱了美元。

You cannot strengthen the weak by weakening the strong.
削弱强者不能使弱者变得强壮。

valve是什么意思：
n. 阀门；瓣膜；真空管
v. 装阀于；以活门调节

Valve Disadvantages: The valve is difficult to close and requires the operator to double close the valve.
阀门的缺点:阀门难以关闭，要求操作者二次关闭阀门。

pilot valve governor
带伺服电动机的调节器辅助调速器

The valve has jammed shut.
阀门给卡住了打不开。