Unicrumb
Unicrumb Unicrumb
  • 03-03-2017
  • History
contestada

In 1908, who invented and patented a rotary drill that could break rock?

Respuesta :

ddaeseleer15
ddaeseleer15 ddaeseleer15
  • 03-03-2017
It was Howard R. Hughes
Answer Link

Otras preguntas

Do lions shiver? Why or why not
This state has the "World's Tallest Living Christmas Tree?" Maine or California?
Mass starvation in Ireland in the 1840s led directly to the (1) formation of communes (2) granting of independence (3) migration of people overseas (4) usag
when an atom of lithium loses an electron, the atom becomes a 1. negative ion with a radius smaller than the radius of the atom 2. negative ion with a radius l
Using the ABC Technologies Inc., Q1 2012 Sales spreadsheet, analyze the data on Q1 2012 Sales identifying the following: >Monthly sales by Product >Quarte
A painter mixed 98.7 gallons of blue paint with 67.05 gallons of red paint In a paint mixing machine how much total paint is in the machine
The French language had a significant impact on ________________. a. Latin c. Middle English b. Old English d. none of the above
What often happened to African residents of regions that became Rich due to exports of local natural resources
humans are protected by some infections by specialized cells which produce chemicals that .... a- destroy microbes b- recycle nutrients c- allow locomotion d
All hypothesis contain three things