Način izrade otvorenog-ključa

1. Ovaj korisni model odnosi se na tehničko područje mehaničke opreme, posebno na otvoreni-ključ.

Pozadinska tehnika:

2. There are many types and structures of existing wrenches, which provide great convenience for people's lives. At present, most wrenches used by people have a single structure, and the angle of use of the wrench cannot be changed, which makes it very inconvenient to use; , Combination wrenches have gradually entered people's field of vision, but the existing combination wrenches are mostly exposed to the air, which easily adheres to impurities and affects the use of the wrench.

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