They are reliant on a very limited number of exportable products.他们依赖数量非常有限的外销产品。Either then produces net exportable electricity for sale to offset plant - operating costs.然后可以产生净输出电能用来销售,从而弥补装置的运营成本.We enclose ( are enc...
The ortho cone helicoid was used interrsect intercept by the ortho cone helicoid and the cylinder.正圆锥螺旋面是正圆柱螺旋面被同轴正圆锥面截得.The surface obtained when every point on the edge generates an involute is called helicoid.表面获得了在边缘...