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Zipper button type test instrument
YG009E button tension tester (...
YG026DL Zipper Comprehensive S...
YG026SL Zipper Comprehensive S...
YG822L zipper torsion testing ...
YG823L button impact strength ...
YG824L Zipper Load Pulling Tes...
YG009 button tension tester (p...
YG821L zipper smoothness teste...