本文介绍了几种比较典型的无定向测量方法，阐明各自的特点和适用范围。
Several typical methods of undirectional measurement were introduced in this paper, and their characteristics and scope of application were expounded.
简要介绍了车辆悬架系统减振控制的现状、主要控制方式的原理、特点和适用范围。
This paper introduces current situation of vibration damp control for vehicle suspension system, principle and feature and applied range.
本文综述了吸附法处理含油废水和水面溢油各种不同吸附剂的组成、特点和适用范围。
The compositions, characteristics and applicable ranges of various adsorbents for the treatment of oil-containing wastewaters or oil spills are reviewed.
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