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actinon ['æktinɔn] n
gen. 锏射气; 锕射气 An (氡的同位素,Em²¹⁹)
chem. 錒射气
earth.sc. 锕射气射气同位素 An²¹⁹
el. 钢射气
met. 锕射气 (An 射气同位素 Em219)
oil 锕射气
actinon: 1 phrase in 1 subject
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