说明：  化工原理的局部阻力系数求解代码，包含粗糙管光滑管局部阻力管拉姆塔和Re求解，还有通过柏拉休斯方程求解拉姆塔，求光滑管误差，最后粗糙管画图
(Local resistance coefficient of chemical principles to solve the code, including smooth and rough tubes and pipes local resistance tube 拉姆塔 Re solving, as well as La Muta by Plato Hughes equation solving, seeking smooth tube errors, finally drawing a rough pipe)