安全保护完善，故障显示，维修。保养无需专业人员。

Improved safety protection, fault indication, maintenance and service without professionals.

youdao

专业人员无需下载新版本的冻结方法。

Practitioners don't need to download new versions of a frozen method.

youdao

专业人员无需下载新版本的冻结方法。

Practitioners don't need to download new versions of a frozen method.

youdao