标称容量 2000W 产品认证 ISO 额定功率 2000W 工作频率 50Hz 工作湿度 95%RH 工作温度 45℃ 适用产品 数据库机房精密仪器医疗设施 输出电压 220V 输出频率 50Hz 输入电压 220V 重量 10kg 转换时间 0.1s 最快出货时间 1-3天 最小包装数 1 输入电压范围 220V 负载类型 计算机和服务器 ...
Teaching has always been part of Ye's life .After retirement,he often went back to school to teach for free. In 2000,he began giving Tree English-language classes to those children whose parents work far away.He first set up (建立)a classroom — "home for left-behi...