Is a quickwater-soluble nitrogen, nitrogen content above 21.0%.
是一种水溶性速效氮肥，氮含量在21.0%以上。
2
After the water quenching of the drill pipe steel grade, the cooling method of drill pipe welds is changed to the quickwater cooling instead of the previous high-pressure air cooling.
钻杆钢种水淬化后，焊缝热处理的冷却方式由以前的高压空气冷却转变为快速水冷却。
3
Whenever I enter a Chinese friend's home, there is always fruit on the table for me, and someone is quick to bring me a cup of tea or water.