usedadj.使用过的；二手的；习惯的动词use的过去式和过去分词.Used as a toast.干杯！祝酒时所用的感叹词used motor vehicle旧机动车used cooling tower旧冷却水塔used bleaching clay废白土used MgO-C bricks用后MgO-C砖Used Towel Disposal毛巾用过放此处Used for washing.用于洗涤的used in making bells用于制钟used nickel catalyst废镍催化剂Used cement pavement旧水泥路面

1. Heat pipe ejective air conditioner is a new no pump system, which can use solar energy and other low-grade heat sources.
   利用热管和喷射器复合所组成的空调系统是一种可利用太阳能和备类余热的无泵型新型空调系统。
2. The organic working fluids bicirculating screw expander power generation technology of surplus heat recovery is just a new energy recovery technology.
   有机工质双循环螺杆膨胀机余热回收发电技术就是一种新型的能量回收技术。