service sleeve
... 工作行程 service run 预埋套管 service sleeve 业务寻线器，控制器；维修开关 service switch ...
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文章介绍了该压缩机基础预埋套管安装及灌浆施工的具体措施和方法。
The concrete measure and method of preburied sleeve installation and grouting construction are addressed in this paper.
youdao
从红线到办公楼的预埋地下电信套管已经考虑。
Underground telecom sleeve pipes from the red line to offices building are foreseen.
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