4、ed"pulsetools"anddesignedforprecisetorqueoutput),majorconstructionprojects,aswellasanyotherneedsofthehightorqueoutput where Thispaperdescribesthedesignofpneumaticwrench,theoreticalcalculation. Pneumaticwrenchdesignedbythemotor,transmissionparts,valvecontrolpart,muffler,shellcomponents,