GB/T 1220-2007 English PDF (GB/T1220-2007) – www,Intellectual Property in Japan (Patent right) Part 09,GB/T 228-2002 English PDF (GBT228-2002) – www.ChineseStandard.us,Qt4-16 Automatic Hydraulic Block Making Machinery Brick,Qt4-16 Automatic Hydraulic Block Making Machinery Brick