a cheerful male worker wearing a safety helmet and protective gear speaks on a headset in a bustling factory environment, emphasizing industry safety and productivity. - 藍領工人 個照片及圖片檔
asian chinese female blue collar worker welder with protective workwear looking away smiling in workshop garage sitting on stool - 藍領工人 個照片及圖片檔
productivity improvement of welding assembly lines in manufacturing industry. manufacturing process engineers having discussion on welding jig design data to improve and reduce defect loss of work piece in welding process. - 藍領工人 個照片及圖片檔
qualified welders working on steel construction, grinding and welding iron parts in modern bright warehouse - 藍領工人 個照片及圖片檔
