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Hanguyenlanthanhtinh
bom piston

tai sao su dung cach nhiet cach am

bom ly tam

nguyen tac thi cong, lap dat cach am, cach nhiet

yeu cau dau may lanh

lua chon vl xay lo cong nghiep

cau truc cach nhiet, cach am

lua chon dau boi tron

R717 (NH3)

so sanh bom lt voi bom pt