|
US3278170A
|
|
Apparatus for placing gases and liquids into intimate contact
|
|
GB862961A
|
|
High speed mixers for solid materials in powder or granular form
|
|
US2791493A
|
|
Manufacture of sulphuric acid
|
|
GB762942A
|
|
Improvements in the manufacture of sulphuric acid
|
|
GB743704A
|
|
Improvements in the manufacture of sulphuric acid
|
|
GB714853A
|
|
Improvements in apparatus for the manufacture of superphosphate and the like
|
|
US2730432A
|
|
Apparatus for the manufacture of superphosphate and the like
|
|
GB677625A
|
|
An improved hammer mill
|
|
US2574346A
|
|
Torsion-rod means for holding grinding rollers in adjustable cooperation with opposing grinding elements
|
|
US2587367A
|
|
Continuous apparatus for the manufacture of superphosphates and similar products
|
