CHEMICAL PROCESSING MACHINE SETTERS, OPERATORS, AND TENDERS
, амер. установщики и аппаратчики в химической промышленности
See:
chemical equipment operators and tenders, separating, filtering, clarifying, precipitating, and still machine setters, operators, and tenders, separating, filtering, clarifying, precipitating, and still machine setters, operators, and tenders, separating, filtering, clarifying, precipitating, and still machine setters, operators, and tenders