下图是哪个设备的图例符号<img src="https://file.icve.com.cn/file_doc_public/802/168/C892A3FE1BF08A43B3B13DB019B0FB9D.png" title="7e04d8e9017907c063a658b0b78a1ee1.png" alt="7e04d8e9017907c063a658b0b78a1ee1.png"/>

【单选题】【消耗次数：1】

① 阀门

② 泵

③ 采气树

④ 集气站

参考答案：

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