... Intake Valve Throttle 进气门节流 VALVE THROTTLE SET 柱塞修理包 throttle valve 节流阀 ; ...
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valve throttle set
阀节流阀组
以上为机器翻译结果，长、整句建议使用 人工翻译 。
To reduce the noise of the control valve, a throttle is set on the export of control valve to make it opening and closing not so frequently.
通过在溢油口开设节流孔，使该阀开启和关闭较为缓和，这样有效地降低了因控制阀造成的噪声。
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