Kev teeb tsa lub hnub ci pv stent qhov chaw: lub tsev ru tsev lossis phab ntsa thiab hauv av, kev taw qhia kev teeb tsa: tsim nyog rau sab qab teb (tseem ceeb qhov system), kev teeb tsa lub kaum sab xis: sib npaug los yog ze rau nruab hauv zos latitude, load yuav tsum: load, daus load, seismic yuav tsum, kev npaj. thiab sib nrug...
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