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Then, how can you tell where the noise is coming from? -花椒- 给 花椒 发送悄悄话 (0 bytes) () 05/20/2009 postreply 15:14:40

Use a sethoscope to listen to noise -internuts- 给 internuts 发送悄悄话 internuts 的博客首页 (0 bytes) () 05/20/2009 postreply 18:20:42

Did LZ use that to determine the source of noise? -花椒- 给 花椒 发送悄悄话 (158 bytes) () 05/21/2009 postreply 07:59:35

Water pump noise is a howling noise -xxhhwxc- 给 xxhhwxc 发送悄悄话 (29 bytes) () 05/21/2009 postreply 09:36:19

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