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measure the weight. Step 4) The sample is placed on a white gauze and pressed into the white or colorless plate Step 5) Dropping the lemon acid and soaking about 40MINS Step 6) Scrub and squeeze the lemon acid into the plate again. Below colse-up, can not be less than 5s 1) Newspaper Name and Date 2. Electronic scales reading 3.The white gauze after scrubbing whether stained color Regards max
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