The technical problems to be solved are: the design of mouth protector and its connection with the broadsword body, shock-proof of power supply and its connection with the broadsword body.
需要解决的技术问题：护口设计及其与刀身的连接，电源防震及其与刀身的连接。
The technical problems to be solved are: the design of mouth protector and its connection with the broadsword body, shock-proof of power supply and its connection with the broadsword body.
需要解决的技术问题：护口设计及其与刀身的连接，电源防震及其与刀身的连接。
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