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actinium-A
gen. 钢-A (针的同位素)
actinium A
earth.sc. 锕 A (针的同位素 Po²¹⁵)
el. 钢А
environ. 锕 A (AcA (钋同位素 Po²¹⁵))
met. 锕 A (AcA 钋同位素 Po215)