IS:3682-1966 Specification for flamep roof alternating current motors for use in mines
Indian Standard Institution Manak Bhawan
IS:3682-1966 Specification for flamep roof alternating current motors for use in mines - ISI Manak bhawan 1966 - 11
IS:3682-1966 Specification for flamep roof alternating current motors for use in mines - ISI Manak bhawan 1966 - 11