Main products: conical twin-screw extruder, parallel twin-screw extruder, single-screw extruder, plastic extrusion line and auxiliary equipment, plastic recycling machine.

A new type of broadband printed twin dipole antenna is proposed in this paper. Corresponding feed structure of broadside coupled parallel line is also designed.

The results shown that the single big twin like convex is (102) and the twin parallel arranged is (112), high density of dislocation existed in twin.