자재비 : materials cost 잡자재비 : miscellaneous materials cost 내선전공 : electrician of indoor wiring 공구손료 : tool rent fee 저압케이블공 : electrician of low-tension cable 특고케이블공 : electrician of super high-tension cable 수배전반 : incoming and distributing pannel(board)

These three items may be interpreted differently. 공구손료: tool wear and tear cost (손료=損料 wear and tear cost) 저압케이블공: "low voltage cable work" or "low voltage cable electrician" 고압케이블공: "low voltage cable work" or "low voltage cable electrician" (압 may mean voltage, pressure, tension, etc) To be sure, one needs to see the whole document, especially if it has Chinese characters.