In the process of friction material testing, the tested sample will have different degrees of thermal expansion under the influence of high temperature, covering the thickness of the sample wear, and sometimes even negative, that is, the thickness of the sample is added after high ໃສ່ອຸນຫະພູມ, ເຊິ່ງບໍ່ສາມາດສະທ້ອນໃຫ້ເຫັນເຖິງການສວມໃສ່ຕົວຈິງແທ້ໆ. Therefore, our factory can not only measure the volume wear of the sample, but also measure the mass wear rate of the sample.Brake pad production company, brake pad manufacturers