定音鼓，或者有时称作半球形铜鼓，它正演奏两个不同的音高，实际上在演奏这个音高和另外一个音高，八度音阶和这个五度。
Timpani or as it's sometimes called a kettledrum, and it was playing two different pitches, actually sort of playing this pitch and this pitch, the octave and then the fifth.
分析了火焰筒鼓包和破裂的形成机制对燃气轮机排气温度分散度的影响，提出了相应措施，以防止因燃烧恶化对热通道部件的伤害。
The formation mechanism of bulging and cracking of combustor inner liner and his influence on gas turbine exhaust temperature dispersity was analyzed.
设计实例表明该程序对于处理可压缩性物料的转鼓真空过滤机的设计计算具有较高的准确度。
The designed instances show that the program has considerably high accuracy for design calculation of rotary drum vacuum filter processing compressible material.
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