Platinotype
n. 铂盐印像法, 铂盐印像法印出的照片
🗣️ 情景例句
Is it too early to call Mr. Carlson?
现在打电话给Carlson先生会不会太早了？
A faithful friend is hard to find.
益友难得。
and we control it by means of the mud which we circulate down the drill pipe.
我们让泥浆顺着钻杆向下循环，用这种方法来控制压力。