B shaped bellow features high degree of supercooling, Iow noise, good performance in energy-saving. It is ideal environment-caring trap.
该阀B型膜盒过冷度大、排水温度低，噪音小，是环保型的理想疏水阀，节能效果显著。
As I sat staring at the candle and smoking I heard a slight noise under the trap door, behind my back.
我一边吸烟，一边在那里呆看放在桌上的蜡烛火，忽而听见梯子口上起了响动。
For anharmonic trap, this excitation has energy-selective characters, and depends on the frequency spectrum of the current noise.
对于非简谐阱，这种激发具有能量选择特性，它又取决于电流噪声的频谱分布。
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