10 分) 註:取1 t/m3 =9.8 kN/m3 ;tan(30°)=0.577;tan(32.5°)=0.637;tan(35°)=0.700; tan(37.5°)=0.767;tan(40°)=0.839;tan(50°)=1.191;tan(52.5°)=1.303; ...
確定! 回上一頁