Some special fields, such as safety technology of welding equipment and safety operation of welding and cutting site etc. , were discussed in detail.
从焊接设备的安全技术、焊割现场安全作业等方面进行了详细论述。
Some special fields, such as safety technology of welding equipment and safety operation of welding and cutting site etc. , were discussed in detail.
从焊接设备的安全技术、焊割现场安全作业等方面进行了详细论述。
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