thanks again, but I am a little bit confused

Should stairs be considered as high traffic area? why semi gross better for high traffic area?

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• 回复：thanks again, but I am a little bit confused -dallascowboys- ♂ (368 bytes) () 09/26/2012 postreply 20:59:15

• got it. thanks. :D) -08明前茶- ♀ (0 bytes) () 09/26/2012 postreply 21:05:02

• 您是专家, 请教:how about several mixed layers? -pyramid- ♂ (150 bytes) () 09/27/2012 postreply 08:11:45

• It is not a good idea. -Dallascowboys- ♂ (244 bytes) () 09/27/2012 postreply 08:30:58