在冷却系统里加防冻剂以防止霜冻.Fill the cooling system with antifreeze as a protection against frost.DEG是 一种溶剂,一般用作生产防冻剂.DEG is used in antifreeze and as a solvent.选择乙二醇作为钻井液的防冻剂可以满足勘探钻进工作的要求.Choosing ethylene alcohol as antifreeze can...
制活版印刷用的电版,需要正读负片菲林.A right - reading negative film is required for making letterpress printing plate.印刷版面准备用作印刷表面的一片金属,塑料,橡胶,纸板或其它材料,例如电版或铅版.The process of preparing a printing surface for electrotyping engraving on a wa...
They may even accuse the child of disloyalty.他们甚至责备孩子不忠诚.Charges had already been made against certain officials suspected of disloyalty.对某些有不忠嫌疑的官员已经提起了诉讼。With such a state of national unity the problem of disloyalty or...