builder smooths concrete of a floor slab

abziehpatscher abziepatsche advertising backdrop bearing boots builder building c25 cement close-up concrete concreting construction costs detail details floor flügelglätter foundation fresh glättkelle home house industry install installation iron liquid manufacture mat mats occupational pad patscher peel plastically poster professionally quality reinforcement reinforcing safety scraper site slab smooth smoothing smooths steel straighten trowel welded worker workers