... restriction orifice 限流孔板 restrictive valve 节流阀；限制器 restrictor 节流阀；节流器，限流器，扼流圈；节气门 ...
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one-way restrictive valve 单向节流阀
fixed restrictive valve 固定节流阀
This problem becomes more critical if the valve is equipped with a restrictive flow orifice.
如果阀门配备有限制流速孔，这个问题就变得更加关键。
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