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該裝置由活塞在容器中密封擠壓，將樣品通過底盤孔壓出到收集器中，從而測試樣品的質(zhì)地特性。Consistency of moisturising cream can be assessed by either a forward extrusion test (simulating the force required to extrude a sample by the consumer) or a backward extrusion test which will give an indication of product physical failure and viscosity.