Necessary electrical and mechanical safety protection devices are provided for all mechanisms.
Necessary electrical and mechanical safety protection devices are provided for all mechanisms.
各机构设有电气、机械的安全保护装置，确保起重机安全地工作。
Necessary electrical and mechanical safety protection devices are provided for all mechanisms.
各机构设有电气、机械的安全保护装置，确保起重机安全地工作。