boiler stack lower view with sun halo light

air base body boiler boots check chimney cloud compressor concept conceptn concrete control desiccant dome dryer ducting earmuff electrical engineer factory floor flushing full glogle halo helmet house industrial industrialsafety inspection ladder light log lower machine maintenance operating panel phenomenon piping plant plate platform power ppe program pump recheck refinery reflection repair row safety service set sheet smoke stack steel suit sun sunroof valve ventilation view work worker