better insulation should be put over pipe and inferior one over it

inferior insulation should be lput over pipe and better one over it

both may be put in any other

whether to put inferior insulation or better insulation over pipe depends on steam temperature

Rickets

Beri-beri

Goitre

Bleeding gums

First Generation Computer

Second Generation Computer

Third Generation Computers

Fourth Generation Computers

22

21

24

19

Iridium and Tungsten

Lead and Tin

Iron and Carbon

Silicon and Germanium