The WC - CO coating produced by electrospark deposition on alloy can effectively improve substrate, swearing resistance.利用新型电火花强化技术,在钛合金材料表面强化WC-Co,可形成具有高耐磨性能强化层表面.In British English the toilet in private houses is calle...
“他该去死,”佩内洛普恶毒地说道。"He deserved to die," said Penelope viciously.妮基恶毒地笑起来。Nikki laughed nastily.他恶毒地盯着那个蜷缩成一团的嫌疑犯.He turned his baleful glare on the cowering suspect....