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Piston
Piston model, more files here:
https://www.3dfindit.com/cad-bim-library?lang=en_US&path=dape%2Fengineering_technology
Piston model, more files here:
https://www.3dfindit.com/cad-bim-library?lang=en_US&path=dape%2Fengineering_technology