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actinium X
gen.
锕X
(AcX (镭同位素 Ra223))
earth.sc.
钢 X
(镭的同位素 Ra²³⁵)
el.
钢X
met.
锕
(X (AcX 镭同位素 Ra
223
))
actinium-X
gen.
钢-X
(锡的同位素)
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