Luoyang Easttec tseg txhua txoj cai los hloov kho cov ntaub ntawv tom qab kev tsim kho thev naus laus zis.
AB series kab rov tav cov menyuam iav tempering rauv feem ntau yog siv los ua kom tiaj tus thiab khoov tempering ntawm ntab iav, architecture iav, rooj tog iav, khoom siv iav, chav da dej iav thiab lwm yam.