Modacrylic xov 22s

2000 Lub tuam txhab yog "tus tswv cuab ntawm Tuam Tshoj Sab Hauv Tsev Kev Koom Tes Zoo", thiab tau ntsuas zoo nkauj hauv huab cua sab hauv, nrog 7 cov khoom patents, thiab nws yog cov paub zoo...