工人打开绿色化粪池盖，盖在混凝土环上方。用于地下污水系统维护和检查的井盖入口。农村污水服务已开通，草地。人工智能生成 向量例证 工人打开绿色化粪池盖，盖在混凝土环上方。用于地下污水系统维护和检查的井盖入口。农村污水服务已开通，草地。人工智能生成
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