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最近,日本研制出一种可测试鱼、肉新鲜度的纸张。这种测试纸是由合成树脂薄膜前面贴有三张五毫米见方的试纸。将试纸接触待测的鱼或肉,便可通过颜色深
Recently, Japan developed a paper that measures the freshness of fish and meat. This test paper is made of synthetic resin film affixed to the front of three five square meters of test strips. The test paper in contact with the fish or meat to be tested, can be deep color