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 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。...
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...