In niobium alloy containing carbon occurs decarburization in case of contamination by oxygen at higher temperature.含碳的铌合金,若在高温下受氧沾污,易产生脱碳现象.Decarburization shall be determined by microscopic examination as described in B...
Collet aimed the binoculars up the hill and adjusted image intensifier dials.科莱把望远镜对着小山丘,调节着镜筒.The intensifier tubes use the photoelectric effect.无源像增强管使用光电效应.Purpose: Used in X - ray image intensifier , flasher, analyti...
Seined Senator Kennedy's tome tumor is in the left prattle parietal lobe of the brain.肯尼迪议员的瘤在大脑左颅顶部.Last week doctors in Massachusetts announced that Seined Senator Tidy Ted Kennedy has brain cancer.上周,麻萨诸塞州的医生宣布特迪...