（1）The hinge structure is adopted, which is convenient to use and facilitate the entry and exit of terminals.

（2）The main body is machined by electric spark with high precision.

（3）It is suitable for large current fittings such as transformer substation or underground cable and crimping of cables.

（4）It is also suitable for pressure welding of C-shaped bushing with branch line.

（5）It must be equipped with one-way manual pump, electric pump, pedal pump, etc.