disc spring assembly
... 组合式踏综盘 built-up tappet 盘簧组合 disc spring assembly 视场光阑-调制盘组合 sield-stop reticule combination ...
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盘簧与两个密封环的组合，可防止因加热或冷却产生的膨胀和收缩，由此确保阀门即使使用多年后仍运行可靠。
This combination of disc springs and dual valve seal rings protects against expansion and contraction due to heating and cooling. This ensures dependable operation, even after years of service.
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