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US2144857A
|
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Sandglass
|
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US1944278A
|
|
Refractory lining for crucibles and the like
|
|
US1759327A
|
|
Apparatus for machining welded rail joints
|
|
US1774816A
|
|
Crucible for aluminothermic reactions
|
|
US1776601A
|
|
Casting mold for aluminothermic rail welding
|
|
GB288309A
|
|
Casting mould for alumino-thermal rail welding
|
|
US1760010A
|
|
Casting mold for alumino-thermic welding
|
|
US1712524A
|
|
Method of preparing sections for aluminothermic welding
|
|
GB256951A
|
|
Improvements relating to railway rail joints
|
|
GB210799A
|
|
Improvements relating to crucibles for alumino-thermic purposes
|
