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When the electrician was decorating the house,to protect the wire,they often put a protective tube on the wire.However, it is extremely difficult to pass a flexible wire throughan angled pipe when the wire needs to pass through a three-way or other multi-way pipe.This situation leads to a higher complexity and lower efficiency inoperation. The design of this product could solve the problem perfectly.When the traction rod is inserted into the pipe,and expand the opening by pressing. Let the thread better pass through the silica gelhole. At this crucial moment,as long as pull out tow bar, the wire will follow it easily.
Jiyang College of Zhejiang A&F
shun an wang,
Jiyang College of Zhejiang A&F University
Hangzhou Dianzi University