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котёл пакетного типа, т.е предварительно собранный на заводе изготовителе, чтобы облегчить монтаж на месте эксплуатации stresses
therm.eng.	packaged boiler (Package boiler The term "package" boiler evolved in the early- to mid-20th century from the practice of delivering boiler units to site already fitted with insulation, electrical panels, valves and gauges. This was in contrast to earlier practice where little more than the pressure vessel was delivered and the ancillary components were fitted on-site. wikipedia.org zh.marinov)