The initial lead in pitchblende belongs to radioactive origin from crust.
沥青铀矿中的初始铅属地壳放射成因。
The maximum height of wrinkling wave does not almost alter with the increase of the initial lead of the mandrel when the initial lead reached a fixed value.
当芯棒伸出量达到一定值后，随着芯棒伸出量的增大，起皱波纹高度极大值变化不明显。
The maximum height of wrinkling wave does not almost alter with the increase of the initial lead of the mandrel when the initial lead reached a fixed value.
当芯棒伸出量达到一定值后，随着芯棒伸出量的增大，起皱波纹高度极大值变化不明显。
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