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1楼 sunrainltd
 等级:小学生 发帖数:5 回帖数:28
| 发帖时间 - 2005/3/21 14:10:40 | *域名隐藏* with a float switch already installed *域名隐藏* many times per day can the pumps be turned on and off without reducing the pump motor life? *域名隐藏* g treated sewer
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2楼 krisfu
 等级:小学生 发帖数:1 回帖数:65
| 发帖时间 - 2005/3/21 14:22:40 | *域名隐藏* with a float switch already installed 已经安装了带浮控开关的泵 *域名隐藏* many times per day can the pumps be turned on and off without reducing the pump motor life? 每天这种泵可以开关多少次而不减低发动机使用寿命? *域名隐藏* g treated sewer 抽吸处理过的污水
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