介绍了双向双螺杆挤出机用传动箱，新型止推装置可替代传统的止推包。
Introduced the driving gear box for bi-directional twin screw extruder, the new thrust device can instead of the traditional thrust fit.
近年来，新型螺杆在塑料行业的应用越来越广泛，国外的大部分挤出机都已经装备了各种新型螺杆。
These years, novel screw is used increasingly in the field of plastic, and most of extruders are equipped with all kinds of screws in some developed countries.
介绍了一种新型嵌套式螺杆挤出机。
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