what's the difference of ASAPVC,APVC and UPVC FROM YUEHAO ROOF TILE 

what's the difference of ASAPVC,APVC and UPVC FROM YUEHAO ROOF TILE
Sandra Lee
Marketing Manager
Foshan Yuehao Building Materials Technology Co.,Ltd
A: Lubao Industry Park,Sanshui District, Foshan,GD China, 528139
T: +86 757 87651699 M: +86 18928568963
F: +86 757 87651799 E: yhtile@yhasa.com
W:www.yhrooftile.com Skype : Lee.sandra93