In order to meet the Tarim Oil Field 's demand for high toughness drill pipes, Baosteel has trial-produced ultra-low sulfur and phosphorussteel for drill pipes.
为了满足塔里木油田对高韧性钻杆的需求,宝钢试制超低硫低磷钻杆用钢。
2
Modern research shows that tomatoes contain protein, fat, glucose, sucrose, vitamin B1, vitamin B2, vitamin C and calcium, phosphorus, iron, steel, zinc and other ingredients, nutritious.