采用气凝胶与干凝胶两种催化剂载体通过化学气相淀积方法制备出螺旋状的碳纳米管。
Helical carbon nanotubes were synthesized by a chemical vapour deposition method from both silica aerogels and silica xerogels containing catalysts.
由于冷端孔板的阻隔，外层气流便高速螺旋状向热端管运动，流动的涡流特性也同时向热端管运动而逐渐减弱。
As a simple device without moving parts, vortex tube is composed of nozzle, vortex chamber, separating plate, control valve, hot-end and cold-end.
由于冷端孔板的阻隔，外层气流便高速螺旋状向热端管运动，流动的涡流特性也同时向热端管运动而逐渐减弱。
As a simple device without moving parts, vortex tube is composed of nozzle, vortex chamber, separating plate, control valve, hot-end and cold-end.
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