Wooden jewelry box for earring, finger ring packing.

木制首饰盒耳环, 戒指包装.

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Multiple V - ring packing , combined with live loading, maintains packing compression under high - cycle and severe service applications.

多重V形环填料, 组合动负载, 维护填料压缩,适用于使用频率高,环境严酷的应用场合.

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Based on analysis of their advantages and disadvantages, ceramic cascade mini ring packing is developed.

介绍了各种瓷质化工填料的特点,在分析了它们优缺点的基础上,扬长避短, 开发了瓷质阶梯环填料.

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