mechanical principle for transfer action （all cams and needles）20

[@PawanKumar-sr4wq]

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[@JUNMAY.Z]

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[@11_Polat_11]

Thank you so much

[@JUNMAY.Z]

You're most welcome

[@pawanseem5695]

Do You teach Sir ?
If Yes how to contact you ?

[@JUNMAY.Z]

my telephone number is 86 17367230721