Ngo-Okthoba olandelayo, i-Tianjin Youfa izothamela imibukiso emi-5 ekhaya naphesheya ukuze ibonise imikhiqizo yethu, okuhlanganisa ipayipi lensimbi ye-carbon, amapayipi ensimbi engagqwali, amapayipi ensimbi ashiselwe, amapayipi othayela, amapayipi ensimbi ayizikwele nawonxande, amapayipi ashiselwe athandelene, amapayipi okufakwayo nezikafula. izesekeli a...
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