Heil tube
英
美
带状电子束速调管
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Hevea
he
He vented himself in grief.
He has three grandchildren.
He did this work patiently.
He seemed venerable to her.
He is a great photographer.
He creeps by Aunt Rachel's.
He never faced his dilemma.
He slogged through the mud.
He runs a computer company.
He abide by his resolution.
英 汉
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