单词：mechanically tunable magnetron
[电子] 机械调谐磁控管
单词：mechanically tunable magnetron 相关文章
微波炉发明源于一项最高军事机密 Many people around the world use a microwave oven every day, not knowing that a crucial part of it was once a top military secret. 世界上许多人每天都在使用微波炉,但却不了解它曾经是一
发表于:2018-12-16 / 阅读(97) / 评论(0)
VOA标准英语2016年(二月)
VOA标准英语2016年(二月)
AGRICULTURE REPORT - Economic Effects of Mad Cow Disease By Mario Ritter Broadcast: Tuesday, January 13, 2004 This is Robert Cohen with the VOA Special English Agriculture Report. Reports suggest that
发表于:2019-01-30 / 阅读(100) / 评论(0)
农业与发展
农业与发展