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الموقع الألكتروني لتوعية المجتمع -
PDF
/ Administrator   
01/11/2007
. PH 7.2 7.4 6 6.8 ( ) .
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PH  7=
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: -  -  - - -- - - - .

:(5)= pH
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() PH =7
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:pH =2.5
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