**Table 4:** Dust species considered in the model calculation.
	Silicates	Carbon	SiC	Iron
AGB stars	$\surd$	$\surd$	$\surd$	$\surd$
SN II	$\surd$	$\surd$	$\surd$	$\surd$
SN Ia	--	--	--	$\surd$
ISM	$\surd$	$\surd$	--	$\surd$

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