antique illustration, applied mechanics: steam powered machines, steam pressure valve - 氣閥 幅插畫檔、美工圖案、卡通及圖標
portrait of senior businessman using tablet wearing work helmet while standing in the hvac ( heating, ventilation and air conditioning systems ) control room of factory. - 氣閥 個照片及圖片檔
shot of fresh roasted coffee beans with a black cup and a white paper bag on wooden table - 氣閥 個照片及圖片檔
preventative maintenance planning of water storage tank for filling process in a water drink bottling industry. a japanese stationary engineer examined a pressure gauge on an ingredient water storage tank to provide maximum water amount and correct press - 氣閥 個照片及圖片檔
effectively maintain a boiler system. service engineer checking the boiler pressure in control room of food processing plant. - 氣閥 個照片及圖片檔
high risk garage area for fires, claim check. woman, claim agent in glasses examining and photographing fire extinguishing pipes and valves in parking garage of condominium - 氣閥 個照片及圖片檔
pipeline system of industrial zone, steel pipeline and valves at factory, pump and motor which popular to install with pipe at industrial such chemical, power plant, oil and gas, cooling tower. - 氣閥 個照片及圖片檔
antique illustration of scientific discoveries: fireplaces, stoves, heaters and chimneys - 氣閥 幅插畫檔、美工圖案、卡通及圖標
