压缩变形测试仪用于评估橡胶的压缩永久变形性能，其方法是在规定时间及可控温度下，对试样施加恒定压缩载荷后，通过测量试样厚度变化并计算压缩永久变形率来实现该评估。 The compression and deformation tester is designed to assess the compression set of rubber by subjecting specimen to constant compression for a given time at a controlled temperature. This assessment is achieved through measuring the variations in the specimen's thickness and calculating the compression set.