I did Google the information

But in the end, all those dust made me very uncomfortable.  :)  If I did not see them, it would be different.

You are very knowledgable, so could you tell me if that is insulation in the 1st pic?

 

所有跟帖： 

• 减噪音 -味苦- ♂ (0 bytes) () 01/29/2016 postreply 16:10:38

• So it would be OK for me to use a rag with water? -joeyli- ♀ (92 bytes) () 01/29/2016 postreply 16:17:02

• 过几个月就这样了，不影响使用 -味苦- ♂ (0 bytes) () 01/29/2016 postreply 16:23:39

• I see. In a few months it will become dusty again... -joeyli- ♀ (0 bytes) () 01/29/2016 postreply 16:31:15