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step-up transformer
释义
物理学词汇手册
step-up transformer
升压变压器
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main arch
main arias
main armament
main artery
main artillery
main aspect of contradiction
main asteroid belt
main attack
main axis
main axis
main-axis nucleus
main axle
main bar
main base
main base
main battle tank
main beam
main beam
main beam
main-beam efficiency
main beam efficiency
main bearing
main bearing
main bearing shell
main bed
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