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Convenient pump / pump

Convenient pump

When we using traditional pump
at ordinary times,oil on the
surface of the rod, might be to
rub our pants.

This design is to solve the
problem. In function diagrams,
we can know that how to use it.
When we using the pump,the
outer layer will prevent oil on
the surface of the core from
our pants .

A little change makes life
more better,more convenient.

University

Nanchang Nniversity

Nanchang Nniversity
Nanchang, China

liangliang Guo,
Nanchang Nniversity