Cov yob rau yob daim ntawv lo tshuab luam ntawv muaj 1.6m, 1.8m, 3.2m txawv me me, ua tau raws li cov kev xav tau ntawm cov ntawv tshaj tawm loj. Sab hauv thiab sab nraum zoov luam tawm luam tawm tam sim no yog ib qho ntawm kev siv loj tshaj plaws ntawm Eco hnyav tshuab luam ntawv. Kev lag luam thev naus laus zis muaj kev xav tau siab rau qhov pom tseeb ntawm cov duab.
