Drill bit bearing lubricator
作者： Donald W Dareing
DOI:
关键词:
摘要:
lens.org 参考文章(6)
Lewis E Garfield, Floyd L Scott, Roller cutter and lubricator therefor ,(1932)
Walter C Francis, Cone bit bearing ,(1946)
Frank L O Wadsworth, Rotary drilling tool ,(1921)
Clarence E Reed, Roller cutter, spindle and bearing assembly for earth boring drills ,(1935)
Gros Charles, Drilling tools for turbine drills ,(1959)
Brunson William H, Clarence Jamison, Rotary drilling tool ,(1923)