1, cantilever bracket: this kind of assembly includes two fixed support and a cantilever, one end of the cantilever is fixed on the support, the other end carries the third part a heavy weight, this kind of assembly is used to withstand the tensile load, and need to maintain the stability of the structure.
2, tripod: tripod is an assembly with three support legs, each leg has a certain angle between them, used to support the camera or other equipment, this assembly needs to ensure that the three legs are equal in length to ensure stability and balance.