Some commercial laboratories use periodic nitrate tests as guides.许多商业性的试验室已应用定期的硝态氮分析作为指导.In the presence of ethanonitrile and glycol, anisole reacts with ammonium ceric nitrate to form o - nitroanisole.在乙腈、聚乙二醇存在下, 用苯甲...
The cables were wrenched from their fastenings.悬索从它们的锚碇处扭断.Gangding, fastenings manufacturing, steel wiredrawing processing.钢钉 、 紧固件制造 、 钢材拉丝加工.The sails are not responding to our pull on the ropes; the fastenings must g...
The prices in brackets are special rates for the under 18s.括号中的价格是年龄在18岁以下的消费者可以享受的特别优惠价。Fix the beam with the brackets and screws.把横梁用托架和螺丝固定。Publication dates are given in brackets after each title.出版日期括于书名后面。...