fountain pens短语⁹⁶⁶⁷⁷⁺⁶ 基本例句 na.自来水钢笔；🌏墨水笔；金笔；钢笔类原型fountainpen的复数 RhodiumRh: Some white gold and sterling silver jewelry is plated with rhodium, which improves its appearance. It is also used in aircraft spark plugs, fountain pens and mammography systems. 铑：一些白金和纯银珠宝以铑作底板，可以改善它们的外观。它也被运用于飞行器的火花塞，钢笔以及乳腺放射成像装置中。 yeeyan