concentrator

1.Concentrators in geological sciences elect either geology or geography.

主修质学的学生要选修质学或程。

2.Biotron, Inc manufactures a wide range of standard and configure-toorder laboratory, research and production-scale fermentation systems. freeze dryer, speed vacuum concentrator and centrifuges.

她生产一系列标准的科研和工业化的发酵设备、冷干机、浓缩仪和离心机，也可根据客订单要求生产和开发非标准设备。

3.A new kind of ferromagnetic collector type fiber-optic current sensor which combines a nubbly magneto-optic material with a ferromagnetic concentrator ring is designed in this paper.

设计了一种应用块状材料与集环相结合的集纤电流传感器。