Torsion wrench is a common manual tool that can be used to tighten or loosen fasteners such as screws and nuts. It has a simple structure and is easy to use, making it one of the essential tools in fields such as home maintenance and mechanical processing.

扭剪扳手的主要部件包括手柄、扳手头和扭剪机构。手柄通常采用塑料或橡胶材料制成，手感舒适，防滑性好。扳手头则根据不同的使用需求，有不同的形状和尺寸。扭剪机构是扭剪扳手的核心部件，它可以将手柄的旋转转化为扳手头的线性运动，从而实现拧紧或松开紧固件的目的。

The main components of a torsion shear wrench include a handle, wrench head, and torsion shear mechanism. The handle is usually made of plastic or rubber materials, providing a comfortable feel and good anti slip performance. Wrench heads come in different shapes and sizes according to different usage needs. The torsion shear mechanism is the core component of a torsion shear wrench, which can convert the rotation of the handle into linear motion of the wrench head, thereby achieving the purpose of tightening or loosening fasteners.

使用扭剪扳手时，要选择合适的扳手头，然后将其插入紧固件中。接着，用手握住手柄，顺时针或逆时针旋转，直到紧固件达到所需的紧度。如果需要松开紧固件，只需将手柄逆时针旋转即可。

When using a torsion wrench, first select a suitable wrench head and then insert it into the fastener. Next, hold the handle with your hand and rotate it clockwise or counterclockwise until the fastener reaches the required tightness. If you need to loosen the fasteners, simply rotate the handle counterclockwise.

扭剪扳手的优点在于它可以精确地控制紧固件的紧度，避免过紧或过松的情况发生。此外，它的结构简单，使用方便，不需要电源或气源，可以在任何地方使用。

The advantage of a torsion wrench is that it can accurately control the tightness of fasteners, avoiding situations of over tightening or loosening. In addition, its structure is simple, easy to use, and it does not require a power or air source, and can be used anywhere.

总之，扭剪扳手是一种实用的手动工具，它可以帮助我们完成各种紧固件的拧紧或松开工作。在使用时，我们应该选择合适的扳手头，掌握正确的使用方法，以免造成不必要的损失。

In short, a torsion wrench is a practical manual tool that can help us complete the tightening or loosening of various fasteners. When using, we should choose the appropriate wrench head and master the correct usage method to avoid unnecessary losses.