movable electronic mark 可移电子标记
The economic analysis of movable mark stone and cement mark stone is given.
最后对活动标石与水泥标石进行了经济分析。
The fabrication and installation of extension mark stones and detachable mark stones are presented. Finally, the economic analysis of movable mark stone and cement mark stone is given.
简介了伸缩型和分体型活动标石的制作及安装，最后对活动标石与水泥标石进行了经济分析。
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