|
GB223431A
|
|
Improvements in or relating to drilling or like machines
|
|
GB222318A
|
|
Improvements in or relating to drilling or like machines
|
|
US1526282A
|
|
Multiple-spindle drill head
|
|
US1511164A
|
|
Multiple drilling machine
|
|
GB200453A
|
|
An improved support or adapter for multiple spindle drill heads
|
|
GB199842A
|
|
Improvements in multiple spindle drill heads
|
|
GB196790A
|
|
Improvements in multiple drilling and grinding apparatus for standard jobs
|
|
GB198473A
|
|
Improvements in drills and grinders
|
|
GB186415A
|
|
Improvements in or relating to multiple-spindle drill-heads
|
|
GB150048A
|
|
Improvements in or relating to drilling-machines
|
