Kumium
(Kumium alloy)库米昂姆合金, 高电[热]导率铜铬合金
🗣️ 情景例句
On a studect visa, full-time work is not permitted.
持学生签证的话，不允许做全职工作。
Mr. Stone Jones of the United Nations.
来自联合国的世通.琼斯先生。
Not to grasp firmly is not to grasp at all.
抓而不紧等于不抓。