æÝÏ ãä ãÄÓÓÊí (HELIA) æ(MPDL) ÇáÅÓÈÇäíÉ íÒæÑ ãÄÓÓÉ áÌÇä ÇáÚãá ÇáÕÍí
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(HELIA) ԡ ǡ ().
ȡ ((MPDL ȡ (H2) ҡ
ȡ ʡ ɡ .
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