more
less
same
could be more or less depending on other factors
DIN
BS
ASTM
IBR
create vacuum in furnace
create vacuum at turbine exhaust
pump feed water
dose chemicals in feed water
babcock and wilcox
locomotive
lancashire
cochran
former is fire tube type and latter is water tube type boiler
former is water tube type and latter is fire tube type
former contains one fire tube and latter contains two fire tubes
None of these