????????c25????????????????????????????????????50cm????????,?????????????(alc?)
??????????????????????,??????,??????????????????????????????????
1:1 1:1.25 1:1.5 ???? 1:0.75 1:1 1:1.252?????????????????????????,????????????????????????

????????????????????????????,??????????????????????????????????????,????????(alc?)
????????????????????????????15????????????????7???,??????75%????????9???????????????,??????,???????????????????????????,????????????10???????????????,

4?????????????,???????,????????,???????????1.5?;????????,?????,?????????????(alc?)
????????????????,????????,????6mm??,????10#??,????12mm×10cm??,????????,????14#??,???????,??????????,??????????????,????????f16?????????,?????????????,

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