Heatproof silastic sealed ring, non - aging and good sealing property.耐热硅橡胶密封圈, 不易老化,密封性能好.Electronics stepless speed regulation , conveyor utilized rotated bar with heatproof tube.电子无级调速, 输送机构采用自转式输送棒并加耐高温套管.Heatproof e...
Objective To study the catalytic activity of potassium bisulfate in synthesizing hexyl hexanoate.目的研究硫酸氢钾在合成己酸己酯工艺中的催化性能.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合...
He was an Italian primitive.他是一位意大利早期的艺术家。The book is about the mythologies of primitive races.这本书是原始民族神话集.Duffy's primitive guitar playing is well below par...达菲粗糙的吉他演奏技巧远不够水平。Objective To observe hypokalemia and s...
Leonie's mother was compelled to take in washing to help support her family...利奥妮的妈妈被迫在家替人洗衣服，以贴补家用。Daily facial exercises help her to retain the skin's elasticity...每天做面部运动帮助她保持皮肤弹性。A lone woman motorist waite...