The utility model has simple structure, and the decorative cover is interchangeable with the blank cap or the screw plug, which simplifies operation and use.
本实用新型结构简单，装饰盖与闷盖或丝堵具有互换性，操作使用简便易行。
The paper presents reasons and preventing measures for crack of big blank cap happened in roughing tool, which can give some reference for such machine production in future.
本文针对近期生产的选矿厂大端盖，在粗车加工时发现的裂纹缺陷进行分析，查找原因，制定预防措施，保证了后期制作此类铸件的质量。
All pipe lines, valves, and nozzles shall be isolated from the atmosphere by a blank, pipe cap, or plug when not being used.
当不在操作使用时，所有管线、阀门、和喷嘴应用盲板、管帽、或塞子使其和大气隔开。
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