Megaperm
镍锰铁高导磁率合金
🗣️ 情景例句
Merry Christmas, Carl and David!
卡尔，大卫，圣诞快乐！
What is it you don't like about winter weather?
你不喜欢冬天什么样的天气？
What are you doing this evening?
今晚你打算干什么？