An Automatic Opening Device for Well Cover
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引用本文: | 柳寿生. 一种井盖门自动开启装置[J]. 工矿自动化, 2003, 29(6): 61-61. |
Citation: | LIU Shou-sheng. An Automatic Opening Device for Well Cover[J]. Industry and Mine Automation, 2003, 29(6): 61-61. |