BRPI0506553A
(pt )
2007-02-27
broca de perfuração da terra e cortador
GB567028A
(da )
1900-01-01
SU345270A1
(ru )
Исполнительный орган двухшпиндельнои бурошнековой машины
SU543732A1
(ru )
1977-01-25
Реактивно-турбинный бур
GB190311565A
(en )
1904-03-24
An Improved Drill for Drilling Coal and other Substances.
GB190015552A
(en )
1900-12-01
Improvements in Boring or Drillilng Tools for Coal and the like.
US1043885A
(en )
1912-11-12
Drill-bit.
CA90302A
(en )
1904-11-29
Method of ejecting cuttings while drilling rock
CA119987A
(en )
1909-08-17
Rock drill and boring tool
US1259319A
(en )
1918-03-12
Well-boring tool.
FR340393A
(fr )
1904-07-05
Perfectionnements apportés aux mèches d'outils à forer
GB190820611A
(en )
1909-04-29
A New or Improved Drilling Tool
ES30485A1
(es )
1902-11-16
Una perforadora o barrena para rocas con taladros amovibles.
CA89360A
(en )
1904-09-27
Anger for boring earth
GB191411279A
(en )
1915-01-14
Improvements in Chucks or Sockets for Rock Boring Drills and the like.
GB190826668A
(en )
1909-05-27
Improvements in and connected with a Combined Boring and Countersinking Drill for Metal Work.
CH48562A
(de )
1910-11-01
Gesteinsbohrmaschine für Tunnelbohrung
ES44709A1
(es )
1909-03-01
Mejoras en taladros de percusión para perforar roca.
GB190515176A
(en )
1905-09-14
Improvements relating to Boring Bits.
CA94535A
(en )
1905-08-01
Rock drill
GB191021666A
(en )
1911-09-18
Improvements in or relating to Drills for Rock Drilling Machines.
GB707747A
(en )
1954-04-21
Improvements in or relating to cutting tools
GB190301614A
(en )
1904-01-21
Improvements in Drills for Mining Purposes.
CA76008A
(en )
1902-05-27
Rock drill stuffing box
CN110857616A
(zh )
2020-03-03
一种钻头