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l The l model can perform central venipuncture under ultrasound guidance, and can provide a series of procedural skills by continuously confirming the placement of the catheter.

|L model was implemented on the same module with both identification method and ultrasound-guided central venipuncture.

| The anatomical position of l model is accurate.

| The l model is divided into three modules, which are suitable for teaching beginners, basic skills of ultrasound puncture, and proficient in central vein puncture and blind puncture.

| L model puncture module is designed separately to facilitate the replacement of modules and the training and examination of different technical abilities.

| L model puncture module is made of special material, and no needle mark will be left after puncture.

| The l model can simulate arterial beating manually.