This standard specifies the classification, parameters, requirements, test methods, inspection rules and marking, packaging, transportation and storage of expansion devices. This standard is applicable to general devices used in dyeing and finishing machinery to prevent wrinkles, remove wrinkles, eliminate curling, and keep fabrics flat in the weft direction.
GB/T 531.1 Rubber,vulcanized or thermoplastic.Determination of indentation hardness.Part 1:Duromerer method( Shore hardness)
GB/T 9239.1-2006 Mechanical vibration. Balance quality requirements for rotors in a constant(rigid) state. Part 1: Specification and verification of balance tolerances