What is the fine-grained topic of the following text: Ideal for experiments under low magnification - Tritech Research, Inc.
Narishige's MWS-31 is a one-axis water hydraulic micromanipulator combined with a three-dimensional manual coarse manipulator for patch clamping applications under low magnifications, such as when using a stereo microscope. Only return the topic.
Narishige's MWS-31 Micromanipulator for Low Magnification Experiments