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

what other information do you need to prove triangle GHK is congruent to triangle KLG by SAS
What metric unit should i use to measure the mass of a monkey
Simple Machine Lever: A ________ that pivots on top of a fixed point called a _______.
three things scientists learned about earth in beginning of 1800s
THE EXPRESSION COT THETA/CSC THETA IS EQUAL TO?
What military strategy defeated cornwallis at yorktown?
The skeletal system does all of the following EXCEPT (A) support. (B) transport. (C) protect. (D) digest. (E) store.
25% of what nember is 19
translate into an equation. Five times the sum of twice a number, x, and six is thirty. Find the number.x = Translate into an equation. The difference b
three things scientists learned about earth in beginning of 1800s