音标：[ˈpækɪŋ nʌt] ；

填密螺母; 衬垫螺母; 密封螺母; 紧塞螺母

词型变化：名词复数形式 : packing nuts

packing nut的用法和样例：

例句

Some wrench-operated valves, specifically those used in ammonia and amines service, have packing nuts with notches machined into the flats.一些扳手型阀门，特别是那些用于氨和胺设施的扳手型阀门的衬垫螺母带有加工进平面的凹槽。

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