restorations acid-etching techniques tooth whitening related pathology other mammals other organisms see also references bibliography external links features[ edit ] enamel is the hardest substance in the human body and contains the highest percentage of minerals (at %) [ ] , with water and organic...
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oil that is stable at high temperature. transformer oil transformer oil are mineral electrical insulating oil prepare from specially refined and carefully selected base oil. automotive oil automotive oil is an oil used for lubrication of various internal combustion engines. industrial oil adreol hydrol...