a(chn)͡ДRܵa(chn)Ӌ
³̎δ֪ ˚⣺ l(f)rg2021-03-01 14:00
O(sh)е܉gmd=lmd’24/(1000t)
Md ——O(sh)е܉sgY(ji)gÿӹλt
l ——܉ЧLȣm
t ——؛ӹrghM(jn)rg
md’ ——܉λLȃd؛|(zh)kg/mȡֵ£
1iw˹Ƅmd’ =200~265k/mC(j)еmd’ =175~250kg/m
ţw˹Ƅ1/2wmd’ =295~400kg/m1/4wmd’=130~265kg/m
w˹Ƅmd’ =170~240kg/m
2~ Ã~܇Pb20kgPmd’ =486kg/m15kgPmd’ =405kg/m
3r Ã~܇Pb2kgPmd’ =216kg/m
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