… Steam or other vapour generating boilers (other than central heating hot water boilers capable also of …
Explanatory notes
… turbines) or other machines using steam power (e.g., steam hammers and pumps) or to supply steam to apparatus for … effect, or quicker vaporisation from fuel-burning boilers has led to the production of boilers differing in structure. … covers and fusible plugs. Metal tubes or pipes which have been bent or curved but not otherwise worked, presented …