A throttling valve core is axially provided with a small throttling hole and an adjusting hole for throttling.
节流阀芯轴向设有节流小孔和调整孔，用于节流。
V-port trim has a more linear throttling curve than plug or ball discs, but none of these trims are recommended for continuous severe throttling which may require using a control valve.
形端口阀内件截止阀比塞形阀瓣或球形阀瓣截止阀具有更加线性的节流曲线，但是，所有这些类型的截止阀都不建议连续用于严格的节流应用中，这种情况可能需要采用控制阀。
Continuous severe throttling applications may require a control valve.
持续严酷的节流应用场合可能需要配置控制阀。
Butterfly valve is closed parts (valve flap or disc for disc), around the valve axis of rotation to achieve the open and close a valve, in the pipeline mainly as shut off and throttling effect.
蝶阀是指关闭件(阀瓣或蝶板)为圆盘，围绕阀轴旋转来达到开启与关闭的一种阀，在管道上主要起切断和节流作用。
A gate valve and a rotary butterfly valve are shown acting as the upstream throttling valve.
图中显示一闸阀及一旋转的蝶阀用作上游节流阀。
The gas throttling governing system comprises a pressure-limiting valve, a speed-limiting valve and a partition board.
气体推助器包括波纹管及内部弹簧、排气阀、吸气阀，气体节流调节系统包括限压阀、限速阀、隔板。
Fisher 8560 Fisher 8560 is a high-performance butterfly valve with a splined shaft for throttling control.
8560是一款高性能蝶阀，可用于绝大多数工况。
Fisher 8560 Fisher 8560 is a high-performance butterfly valve with a splined shaft for throttling control.
8560是一款高性能蝶阀，可用于绝大多数工况。
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