In the design theory,will be connected to some thought of as an ideal situation,without taking into account the connection between twenty actual situation,especially not when considering if only SLE,can be achieved across the entire organization connection.Development agencies will be connected to an ideal structure,taking into account the impact of physical volume of the body,we design two kinds of turn four as the main connection,deputy vice,used in conjunction with the corresponding SLE.Design shown in Figure 4.2,the boss right thickness and the thickness of two kinds of connections made equal,and the rod and the thickness of SLE is the same,is the only way to connect easily to ensure the success of institutions,the theory is feasible .Another article in the institution of the drive section also inserts a special structure.The specific process not to repeat them here.