Obm
abbr. 自创品牌（Orignal Brand Manufactuce）；[冶]底吹纯氧转炉炼钢（Oxygen bottom-blown Maxhuette）
🗣️ 情景例句
Tell me about your book.
谈谈你的书吧。
There is no fire without smoke.
无火没有烟。
I would be very grateful for information about entry to your college.
若能寄给我贵校的入学申请材料我将十分感激。