Vacuum-hot air drier (abbreviated as VDH) is one of the modern technique used in the line of electrical engineering.
真空热风干燥简称VDH，它是应用于电工行业中的一种新兴工艺技术。
On the center of vacuum drying equipment with hot air, VDH, the structure, main technical specification, drying mechanism of the equipment and the customer value are emphatically described in the paper.
本文以VDH型真空热风干燥设备为核心。着重论述了该设备的结构特点、主要技术性能、干燥机理以及用户评价。
To observe the clinical trends of rheumatic fever and rheumatic valvular disease of heart (VDH), the clinical date including incidence, features, treatment, prevention and recurrence were analyzed in 85 children with rheumatic fever and rheumatic VDH which were diagnosed during 1990 years.
为观察儿童风湿热及风湿性心瓣膜病临床动态变化趋势，分析本院90年代诊治的85例风湿热及心瓣膜病发生状况、临床特点和治疗预防复发情况。