Parkerise
磷酸盐被膜(防锈)处理
🗣️ 情景例句
How was your trip to New York?
你的纽约之行如何?
This is not an occasion for laguhter.
现在不是该笑的时候。
The spheres had been magnetized and attracted or repelled each other all the time.
金属球经过磁化，互相之间不停地相互吸引或相互排斥。