轨道计算，主要应用于美国空间中心公布的双行根数计算。进行预报。-Orbital calculations, mainly used in the U.S. Space Center announced the number of double-root calculation. To predict.

根据钢筋长度、根数、直径，自动计算钢筋重量-According bar length, root number, diameter, automatic calculation of steel weight