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[Machinery] Material selection and quality judgment of hinge

[Machinery] Stainless steel rotary tongue safe lock

[Machinery] Stainless steel compression lock fixed handle with suspension and key lock

[Machinery] Handle of high performance nylon plastic electric cabinet

[Machinery] Application scope and limitation of cross lock

[Machinery] Elegant and stylish purple luggage hinge

[Machinery] Movable handle of colorful zinc alloy compression lock

[Machinery] Door lock of environmental science laboratory in scientific research institute

[Machinery] Geological exploration instrument protection door lock

[Machinery] Safe lockf

[Machinery] Literary style wooden frame door hinge

[Machinery] T-handle for industrial equipment

[Machinery] Simple and practical wind black filing cabinet practical hinge

[Machinery] Rotary filing cabinet lock

[Machinery] Door lock of campus boiler room