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高锰酸钙
【 在 Nicht8634 (老虎) 的大作中提到: 】
: Per manganat Calium ( PK )
: try to use Per manganat Calium ( PK ) - can buy from apotic / medecine shop
: desolve it in a small pail...you can see the water colour will become violet in colour
: ...................
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