engineering drawing documents with wrench. maintencance concept

and business calculation chart concept construct construction contract contractor corporate count counting cover day days deadline diagram document documents draft drawing drawings engineer engineering equipments eyeglases eyeglass eyeglasses flow for gantt gas hand industry initiate initiating leadership maintain maintenance maintencance management mechanical meeting office oil organize organizing paper papers pen pencil plan planning procurement project proposal requirements resources schedule structure subcontract subcontracting supplier table team technical timeframe timescale vendor white work working wrench writing