求翻译：任职期间进行了大量的技改项目，如激光切割机气动吸料机、二氧化碳保护焊焊接旋转平台、门机装配流水线等，大大提高了生产效率。是什么意思？

During his tenure were a large number of technology projects, such as laser cutting machine pneumatic suction machines, carbon dioxide shielded welding rotating platform, door machine assembly lines, greatly improved production efficiency.

During his tenure has been a great deal of technology projects, such as laser cutting machines, pneumatic suction machine 2 carbon dioxide protected welding rotary platform, doors, such as the assembly line, greatly increasing efficiency.

Assignment period has carried on the massive technological transformation project, like the laser cutter air operated attracts the material machine, the carbon dioxide protection welds the welding revolving platform, the gate machine assembly assembly line and so on, enhanced the production efficien

During a lot of technological transformation project, such as a laser cutting machine pneumatic suction rotating platform, carbon dioxide welding machine, welding machine assembly line, greatly improving the production efficiency.

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